Connection failed: SQLSTATE[HY000] [1698] Access denied for user 'root'@'localhost'<form action="changePassword.php" method="post">Username: <input type="text" name="userName"><br>Old password: <input type="password" name="oldpassword"><br>New password: <input type="password" name="newpassword"><br><input type="submit" value="Change"></form>