Warning: Undefined variable $factory in C:\Apache24\htdocs\laravelcurso\database\factories\UserFactory.php on line 16

Fatal error: Uncaught Error: Call to a member function define() on null in C:\Apache24\htdocs\laravelcurso\database\factories\UserFactory.php:16 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\laravelcurso\database\factories\UserFactory.php on line 16