Unexpected Exception: SQLSTATE[HY000] [1045] Access denied for user ****@'localhost' (using password: YES)

Sometimes Access denied Exception Error because your mysql credentials are invalid. Secondly, from my experience i observed that this also happens because you did not set password to your database connectivity. eg

private $host = "localhost";
private $db_name = "db_dbtest"; // Database name
private $username = "db_user"; // your database username
private $password = "db_password"; // Your password
public $conn;

}

Try and set password to your database connectivity. I had such experience and after changing my Collation to utf8_general_ci on the Operations tab, this could not solve my problem. I thought of adding password to my database connection and immediately it connected. You can tesrun this and see if it helps.

You're getting Access denied Exception Error because your mysql credentials are invalid.

This is due to the wrong sql information provided by you.Changing it to the right one can solve this error .