fix being able to register with taken username

src/api/routes/experiments.ts

@@ -35,7 +35,7 @@ router.get("/", route({}), (req: Request, res: Response) => {
 	if (uniqueUsernames) {
 		// hash, revision, bucket, override, population, hash_result, as_mode
 		// bucket 4 is used by the official client, and enables live checking and suggestions, 3 is only live checking
-		data.assignments.push([2476969328, 0, 3, -1, 0, 9267, 0, 0]);
+		data.assignments.push([2476969328, 0, 4, -1, 0, 9267, 0, 0]);
 	}
 	res.send(data);
 });

src/api/routes/unique-username/username-attempt-unauthed.ts

@@ -25,7 +25,7 @@ router.post(
 		}
 
 		res.json({
-			taken: !User.isUsernameAvailable(body.username),
+			taken: !(await User.isUsernameAvailable(body.username)),
 		});
 	},
 );

src/api/routes/users/@me/index.ts

@@ -152,7 +152,7 @@ router.patch(
                 }
 
                 // check if username is already taken (pomelo only)
-				if (!User.isUsernameAvailable(body.username))
+				if (!(await User.isUsernameAvailable(body.username)))
                     throw FieldErrors({
                         username: {
                             code: "USERNAME_ALREADY_TAKEN",