Connection failed: SQLSTATE[HY000] [1045] Access denied for user 'db-user16485'@'localhost' (using password: YES)<form action="changeUsername.php" method="post">Old username: <input type="text" name="userName"><br>New username: <input type="text" name="newusr"><br>Password: <input type="password" name="password"><br><input type="submit" value="Change"></form>