mysql gow can limk with my login to conect w external web [duplicate]

how can configur my login to mysql

Fatal error: Uncaught mysqli_sql_exception: Unknown database ‘login-php’ in C:xampphtdocsautenticacion.php:14 Stack trace: #0 C:xampphtdocsautenticacion.php(14): mysqli_connect(‘localhost’, ‘root’, Object(SensitiveParameterValue), ‘login-php’) #1 {main} thrown in C:xampphtdocsautenticacion.php on line 14