diff --git a/DatabaseSchema.md b/DatabaseSchema.md
index 32fdc6e..16aa6f8 100644
--- a/DatabaseSchema.md
+++ b/DatabaseSchema.md
@@ -3,6 +3,7 @@
 [vipUsers](###vipUsers)  
 [sponsorTimes](###sponsorTimes)  
 [userNames](###userNames)  
+[userNameLogs](###userNameLogs)  
 [categoryVotes](###categoryVotes)  
 [lockCategories](###lockCategories)  
 [warnings](###warnings)  
@@ -61,6 +62,16 @@
 | -- | :--: |
 | userNames_userID | userID |
 
+### userNameLogs
+
+| Name | Type | |
+| -- | :--: | -- |
+| userID | TEXT | not null |
+| newUserName | TEXT | not null |
+| oldUserName | TEXT | not null |
+| updatedByAdmin | BOOLEAN | not null |
+| updatedAt | INTEGER | not null |
+
 ### categoryVotes
 
 | Name | Type | |
diff --git a/databases/_upgrade_private_2.sql b/databases/_upgrade_private_2.sql
new file mode 100644
index 0000000..1a70e67
--- /dev/null
+++ b/databases/_upgrade_private_2.sql
@@ -0,0 +1,13 @@
+BEGIN TRANSACTION;
+
+CREATE TABLE IF NOT EXISTS "userNameLogs" (
+	"userID"	TEXT NOT NULL,
+	"newUserName"	TEXT NOT NULL,
+	"oldUserName"	TEXT NOT NULL,
+	"updatedByAdmin"	BOOLEAN NOT NULL,
+	"updatedAt"	INTEGER NOT NULL
+);
+
+UPDATE "config" SET value = 2 WHERE key = 'version';
+
+COMMIT;
\ No newline at end of file
diff --git a/src/app.ts b/src/app.ts
index 71a85bd..e02953c 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -32,6 +32,7 @@ import {endpoint as getSegmentInfo} from './routes/getSegmentInfo';
 import {postClearCache} from './routes/postClearCache';
 import { addUnlistedVideo } from './routes/addUnlistedVideo';
 import {postPurgeAllSegments} from './routes/postPurgeAllSegments';
+import {getUserID} from './routes/getUserID';
 
 export function createServer(callback: () => void) {
     // Create a service (the app object is just a callback).
@@ -146,6 +147,9 @@ function setupRoutes(app: Express) {
     app.post('/api/purgeAllSegments', postPurgeAllSegments);
 
     app.post('/api/unlistedVideo', addUnlistedVideo);
+    
+    // get userID from username
+    app.get('/api/userID', getUserID);
 
     if (config.postgres) {
         app.get('/database', (req, res) => dumpDatabase(req, res, true));
diff --git a/src/routes/getUserID.ts b/src/routes/getUserID.ts
new file mode 100644
index 0000000..6ecc1b7
--- /dev/null
+++ b/src/routes/getUserID.ts
@@ -0,0 +1,55 @@
+import {db} from '../databases/databases';
+import {Request, Response} from 'express';
+import {UserID} from '../types/user.model';
+
+function getFuzzyUserID(userName: String): Promise<{userName: String, userID: UserID }[]>  {
+    // escape [_ % \] to avoid ReDOS
+    userName = userName.replace(/\\/g, '\\\\')
+        .replace(/_/g, '\\_')
+        .replace(/%/g, '\\%');
+    userName = `%${userName}%`; // add wildcard to username
+    // LIMIT to reduce overhead | ESCAPE to escape LIKE wildcards
+    try {
+        return db.prepare('all', `SELECT "userName", "userID" FROM "userNames" WHERE "userName"
+        LIKE ? ESCAPE '\\' LIMIT 10`, [userName])
+    } catch (err) {
+        return null;
+    }
+}
+
+function getExactUserID(userName: String): Promise<{userName: String, userID: UserID }[]>  {
+    try {
+        return db.prepare('all', `SELECT "userName", "userID" from "userNames" WHERE "userName" = ? LIMIT 10`, [userName]);
+    } catch (err) {
+        return null;
+    }
+}
+
+export async function getUserID(req: Request, res: Response) {
+    let userName = req.query.username as string;
+    const exactSearch = req.query.exact
+        ? req.query.exact == "true"
+        : false as Boolean;
+    
+    // if not exact and length is 1, also skip
+    if (userName == undefined || userName.length > 64 ||
+        (!exactSearch && userName.length < 3)) {
+        // invalid request
+        res.sendStatus(400);
+        return false;
+    }
+    const results = exactSearch
+        ? await getExactUserID(userName)
+        : await getFuzzyUserID(userName);
+
+    if (results === undefined || results === null) {
+        res.sendStatus(500);
+        return false;
+    } else if (results.length === 0) {
+        res.sendStatus(404);
+        return false;
+    } else {
+        res.send(results);
+        return false;
+    }
+}
diff --git a/src/routes/setUsername.ts b/src/routes/setUsername.ts
index dfc8108..daebc9f 100644
--- a/src/routes/setUsername.ts
+++ b/src/routes/setUsername.ts
@@ -1,9 +1,16 @@
 import {config} from '../config';
 import {Logger} from '../utils/logger';
-import {db} from '../databases/databases';
+import {db, privateDB} from '../databases/databases';
 import {getHash} from '../utils/getHash';
 import {Request, Response} from 'express';
 
+async function logUserNameChange(userID: string, newUserName: string, oldUserName: string, updatedByAdmin: boolean): Promise<void>  {
+    return privateDB.prepare('run',
+        `INSERT INTO "userNameLogs"("userID", "newUserName", "oldUserName", "updatedByAdmin", "updatedAt") VALUES(?, ?, ?, ?, ?)`,
+        [userID, newUserName, oldUserName, + updatedByAdmin, new Date().getTime()]
+    );
+}
+
 export async function setUsername(req: Request, res: Response) {
     let userID = req.query.userID as string;
     let userName = req.query.username as string;
@@ -55,11 +62,13 @@ export async function setUsername(req: Request, res: Response) {
 
     try {
         //check if username is already set
-        const row = await db.prepare('get', `SELECT count(*) as count FROM "userNames" WHERE "userID" = ?`, [userID]);
+        const row = await db.prepare('get', `SELECT "userName" FROM "userNames" WHERE "userID" = ? LIMIT 1`, [userID]);
         const locked = adminUserIDInput === undefined ? 0 : 1;
+        let oldUserName = '';
 
-        if (row.count > 0) {
+        if (row.userName && row.userName.length !== 0) {
             //already exists, update this row
+            oldUserName = row.userName;
             await db.prepare('run', `UPDATE "userNames" SET "userName" = ? WHERE "userID" = ?`, [userName, userID]);
             await db.prepare('run', `UPDATE "userNames" SET "locked" = ? WHERE "userID" = ?`, [locked, userID]);
         } else {
@@ -67,6 +76,8 @@ export async function setUsername(req: Request, res: Response) {
             await db.prepare('run', `INSERT INTO "userNames"("userID", "userName", "locked") VALUES(?, ?, ?)`, [userID, userName, locked]);
         }
 
+        await logUserNameChange(userID, userName, oldUserName, adminUserIDInput !== undefined);
+
         res.sendStatus(200);
     } catch (err) {
         Logger.error(err);
diff --git a/test/cases/getSegmentInfo.ts b/test/cases/getSegmentInfo.ts
index 3f03027..a6c2f0d 100644
--- a/test/cases/getSegmentInfo.ts
+++ b/test/cases/getSegmentInfo.ts
@@ -3,20 +3,20 @@ import {db} from '../../src/databases/databases';
 import {Done, getbaseURL} from '../utils';
 import {getHash} from '../../src/utils/getHash';
 
-const ENOENTID =        "0000000000000000000000000000000000000000000000000000000000000000"
-const upvotedID =       "a000000000000000000000000000000000000000000000000000000000000000"
-const downvotedID =     "b000000000000000000000000000000000000000000000000000000000000000"
-const lockedupID =      "c000000000000000000000000000000000000000000000000000000000000000"
-const infvotesID =      "d000000000000000000000000000000000000000000000000000000000000000"
-const shadowhiddenID =  "e000000000000000000000000000000000000000000000000000000000000000"
-const lockeddownID =    "f000000000000000000000000000000000000000000000000000000000000000"
-const hiddenID =        "1000000000000000000000000000000000000000000000000000000000000000"
-const fillerID1 =       "1100000000000000000000000000000000000000000000000000000000000000"
-const fillerID2 =       "1200000000000000000000000000000000000000000000000000000000000000"
-const fillerID3 =       "1300000000000000000000000000000000000000000000000000000000000000"
-const fillerID4 =       "1400000000000000000000000000000000000000000000000000000000000000"
-const fillerID5 =       "1500000000000000000000000000000000000000000000000000000000000000"
-const oldID =           "a0000000-0000-0000-0000-000000000000"
+const ENOENTID =        "0".repeat(64);
+const upvotedID =       "a"+"0".repeat(63);
+const downvotedID =     "b"+"0".repeat(63);
+const lockedupID =      "c"+"0".repeat(63);
+const infvotesID =      "d"+"0".repeat(63);
+const shadowhiddenID =  "e"+"0".repeat(63);
+const lockeddownID =    "f"+"0".repeat(63);
+const hiddenID =        "1"+"0".repeat(63);
+const fillerID1 =       "11"+"0".repeat(62);
+const fillerID2 =       "12"+"0".repeat(62);
+const fillerID3 =       "13"+"0".repeat(62);
+const fillerID4 =       "14"+"0".repeat(62);
+const fillerID5 =       "15"+"0".repeat(62);
+const oldID =           `${'0'.repeat(8)}-${'0000-'.repeat(3)}${'0'.repeat(12)}`;
 
 describe('getSegmentInfo', () => {
     before(async () => {
diff --git a/test/cases/getUserID.ts b/test/cases/getUserID.ts
new file mode 100644
index 0000000..7fe5d70
--- /dev/null
+++ b/test/cases/getUserID.ts
@@ -0,0 +1,403 @@
+import fetch from 'node-fetch';
+import {Done, getbaseURL} from '../utils';
+import {db} from '../../src/databases/databases';
+import {getHash} from '../../src/utils/getHash';
+
+describe('getUserID', () => {
+    before(async () => {
+        const insertUserNameQuery = 'INSERT INTO "userNames" ("userID", "userName") VALUES(?, ?)';
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_01"), 'fuzzy user 01']);
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_02"), 'fuzzy user 02']);
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_03"), 'specific user 03']);
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_04"), 'repeating']);
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_05"), 'repeating']);
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_06"), getHash("getuserid_user_06")]);
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_07"), '0redos0']);
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_08"), '%redos%']);
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_09"), '_redos_']);
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_10"), 'redos\\%']);
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_11"), '\\\\\\']);
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_12"), 'a']);
+    });
+
+    it('Should be able to get a 200', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=fuzzy+user+01')
+        .then(async res => {
+            const text = await res.text()
+            if (res.status !== 200) done('non 200 (' + res.status + ')');
+            else done(); // pass
+        })
+        .catch(err => done('couldn\'t call endpoint'));
+    });
+
+    it('Should be able to get a 400 (No username parameter)', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID')
+        .then(res => {
+            if (res.status !== 400) done('non 400 (' + res.status + ')');
+            else done(); // pass
+        })
+        .catch(err => done('couldn\'t call endpoint'));
+    });
+
+    it('Should be able to get a 200 (username is public id)', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username='+getHash("getuserid_user_06"))
+        .then(async res => {
+            const text = await res.text()
+            if (res.status !== 200) done('non 200 (' + res.status + ')');
+            else done(); // pass
+        })
+        .catch(err => done('couldn\'t call endpoint'));
+    });
+
+    it('Should be able to get a 400 (username longer than 64 chars)', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username='+getHash("getuserid_user_06")+'0')
+        .then(res => {
+            if (res.status !== 400) done('non 400 (' + res.status + ')');
+            else done(); // pass
+        })
+        .catch(err => done('couldn\'t call endpoint'));
+    });
+
+    it('Should be able to get single username', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=fuzzy+user+01')
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 1) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== "fuzzy user 01") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== getHash("getuserid_user_01")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('Should be able to get multiple fuzzy user info from start', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=fuzzy+user')
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 2) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== "fuzzy user 01") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== getHash("getuserid_user_01")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else if (data[1].userName !== "fuzzy user 02") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[1].userID !== getHash("getuserid_user_02")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('Should be able to get multiple fuzzy user info from middle', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=user')
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 3) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== "fuzzy user 01") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== getHash("getuserid_user_01")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else if (data[1].userName !== "fuzzy user 02") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[1].userID !== getHash("getuserid_user_02")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else if (data[2].userName !== "specific user 03") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[2].userID !== getHash("getuserid_user_03")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('Should be able to get with public ID', (done: Done) => {
+        const userID = getHash("getuserid_user_06");
+        fetch(getbaseURL() + '/api/userID?username='+userID)
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 1) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== userID) {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== userID) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('Should be able to get with fuzzy public ID', (done: Done) => {
+        const userID = getHash("getuserid_user_06");
+        fetch(getbaseURL() + '/api/userID?username='+userID.substr(10,60))
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 1) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== userID) {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== userID) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('Should be able to get repeating username', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=repeating')
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 2) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== "repeating") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== getHash("getuserid_user_04")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else if (data[1].userName !== "repeating") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[1].userID !== getHash("getuserid_user_05")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('Should be able to get repeating fuzzy username', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=peat')
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 2) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== "repeating") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== getHash("getuserid_user_04")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else if (data[1].userName !== "repeating") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[1].userID !== getHash("getuserid_user_05")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('should avoid ReDOS with _', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=_redos_')
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 1) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== "_redos_") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== getHash("getuserid_user_09")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('should avoid ReDOS with %', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=%redos%')
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 1) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== "%redos%") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== getHash("getuserid_user_08")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('should return 404 if escaped backslashes present', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=%redos\\\\_')
+        .then(res => {
+            if (res.status !== 404) done('non 404 (' + res.status + ')');
+            else done(); // pass
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('should return 404 if backslashes present', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=\\%redos\\_')
+        .then(res => {
+            if (res.status !== 404) done('non 404 (' + res.status + ')');
+            else done(); // pass
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('should return user if just backslashes', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=\\\\\\')
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 1) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== "\\\\\\") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== getHash("getuserid_user_11")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('should not allow usernames more than 64 characters', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username='+'0'.repeat(65))
+        .then(res => {
+            if (res.status !== 400) done('non 400 (' + res.status + ')');
+            else done(); // pass
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('should not allow usernames less than 3 characters', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=aa')
+        .then(res => {
+            if (res.status !== 400) done('non 400 (' + res.status + ')');
+            else done(); // pass
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('should allow exact match', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=a&exact=true')
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 1) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== "a") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== getHash("getuserid_user_12")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('Should be able to get repeating username with exact username', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=repeating&exact=true')
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 2) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== "repeating") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== getHash("getuserid_user_04")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else if (data[1].userName !== "repeating") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[1].userID !== getHash("getuserid_user_05")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('Should not get exact unless explicitly set to true', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=user&exact=1')
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 3) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== "fuzzy user 01") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== getHash("getuserid_user_01")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else if (data[1].userName !== "fuzzy user 02") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[1].userID !== getHash("getuserid_user_02")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else if (data[2].userName !== "specific user 03") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[2].userID !== getHash("getuserid_user_03")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+});
diff --git a/test/cases/setUsername.ts b/test/cases/setUsername.ts
index f96e1f4..7d7bb49 100644
--- a/test/cases/setUsername.ts
+++ b/test/cases/setUsername.ts
@@ -1,6 +1,6 @@
 import fetch from 'node-fetch';
 import { Done, getbaseURL } from '../utils';
-import { db } from '../../src/databases/databases';
+import { db, privateDB } from '../../src/databases/databases';
 import { getHash } from '../../src/utils/getHash';
 
 const adminPrivateUserID = 'testUserId';
@@ -21,6 +21,7 @@ const username07 = 'Username 07';
 
 async function addUsername(userID: string, userName: string, locked = 0) {
     await db.prepare('run', 'INSERT INTO "userNames" ("userID", "userName", "locked") VALUES(?, ?, ?)', [userID, userName, locked]);
+    await addLogUserNameChange(userID, userName);
 }
 
 async function getUsernameInfo(userID: string): Promise<{ userName: string, locked: string }> {
@@ -31,6 +32,40 @@ async function getUsernameInfo(userID: string): Promise<{ userName: string, lock
     return row;
 }
 
+async function addLogUserNameChange(userID: string, newUserName: string, oldUserName: string = '') {
+    privateDB.prepare('run',
+        `INSERT INTO "userNameLogs"("userID", "newUserName", "oldUserName", "updatedAt", "updatedByAdmin") VALUES(?, ?, ?, ?, ?)`,
+        [getHash(userID), newUserName, oldUserName, new Date().getTime(), + true]
+    );
+}
+
+async function getLastLogUserNameChange(userID: string) {
+    return privateDB.prepare('get', `SELECT * FROM "userNameLogs" WHERE "userID" = ? ORDER BY "updatedAt" DESC LIMIT 1`, [getHash(userID)]);
+}
+
+function wellFormatUserName(userName: string) {
+    return userName.replace(/[\u0000-\u001F\u007F-\u009F]/g, '');
+}
+
+async function testUserNameChangelog(userID: string, newUserName: string, oldUserName: string, byAdmin: boolean, done: Done) {
+
+    const log = await getLastLogUserNameChange(userID);
+
+    if (newUserName !== log.newUserName) {
+        return done(`UserID '${userID}' incorrect log on newUserName: ${newUserName} !== ${log.newUserName}`);
+    }
+
+    if (oldUserName !== log.oldUserName) {
+        return done(`UserID '${userID}' incorrect log on oldUserName: ${oldUserName} !== ${log.oldUserName}`);
+    }
+
+    if (byAdmin !== Boolean(log.updatedByAdmin)) {
+        return done(`UserID '${userID}' incorrect log on updatedByAdmin: ${byAdmin} !== ${log.updatedByAdmin}`);
+    }
+
+    return done();
+}
+
 describe('setUsername', () => {
     before(async () => {
         await addUsername(getHash(user01PrivateUserID), username01, 0);
@@ -46,9 +81,11 @@ describe('setUsername', () => {
         fetch(`${getbaseURL()}/api/setUsername?userID=${user01PrivateUserID}&username=Changed%20Username`, {
             method: 'POST',
         })
-        .then(res => {
+        .then(async res => {
             if (res.status !== 200) done(`Status code was ${res.status}`);
-            else done(); // pass
+            else {
+                testUserNameChangelog(user01PrivateUserID, decodeURIComponent('Changed%20Username'), username01, false, done);
+            }
         })
         .catch(err => done(`couldn't call endpoint`));
     });
@@ -114,7 +151,7 @@ describe('setUsername', () => {
             const usernameInfo = await getUsernameInfo(getHash(user03PrivateUserID));
             if (usernameInfo.userName !== newUsername) done(`Username did not change`);
             if (usernameInfo.locked == "1") done(`Username was locked when it shouldn't have been`);
-            else done();
+            testUserNameChangelog(user03PrivateUserID, newUsername, username03, false, done);
         })
         .catch(err => done(`couldn't call endpoint`));
     });
@@ -141,7 +178,7 @@ describe('setUsername', () => {
         .then(async res => {
             const usernameInfo = await getUsernameInfo(getHash(user05PrivateUserID));
             if (usernameInfo.userName === newUsername) done(`Username contains unicode control characters`);
-            else  done();
+            testUserNameChangelog(user05PrivateUserID, wellFormatUserName(newUsername), username05, false, done);
         })
         .catch(err => done(`couldn't call endpoint`));
     });
@@ -167,7 +204,7 @@ describe('setUsername', () => {
             const usernameInfo = await getUsernameInfo(getHash(user06PrivateUserID));
             if (usernameInfo.userName !== newUsername) done(`Failed to change username from '${username06}' to '${newUsername}'`);
             if (usernameInfo.locked == "0") done(`Username was not locked`);
-            else done();
+            else testUserNameChangelog(user06PrivateUserID, newUsername, username06, true, done);
         })
         .catch(err => done(`couldn't call endpoint`));
     });
@@ -181,7 +218,7 @@ describe('setUsername', () => {
             const usernameInfo = await getUsernameInfo(getHash(user06PrivateUserID));
             if (usernameInfo.userName !== newUsername) done(`Failed to change username from '${username06}' to '${newUsername}'`);
             if (usernameInfo.locked == "0") done(`Username was unlocked when it shouldn't have been`);
-            else done();
+            else testUserNameChangelog(user07PrivateUserID, newUsername, username07, true, done);
         })
         .catch(err => done(`couldn't call endpoint`));
     });