Illuminate\Contracts\Container\BindingResolutionException Target class [App\Http\Middleware\AuthGates] does not exist. code example

Example: class [App\Http\Middleware\EnsureEmailIsVerified] does not exist when there is a file

Well first of all look at the namespaces:

namespace Illuminate\Auth\Middleware;

you should rename it to:

namespace App\Http\Middleware;