Fatal error: Uncaught mysqli_sql_exception: Access denied for user 'root'@'localhost' (using password: NO) in /home/grupo518/public_html/Mostrar_citas.php:8 Stack trace: #0 /home/grupo518/public_html/Mostrar_citas.php(8): mysqli->__construct() #1 {main} thrown in /home/grupo518/public_html/Mostrar_citas.php on line 8