Route::middleware('auth:api')->get('/user', function (Request $request) {
    return $request->user();
});

Argument 1 passed to IlluminateAuthTokenGuard::__construct() must implement interface IlluminateContractsAuthUserProvider, null given, called in /Users/markusheinemann/Projekte/Lycus/application/vendor/laravel/framework/src/Illuminate/Auth/AuthManager.php on line 162

{
  content-type: "application/json",
  x-requested-with: "XMLHttpRequest",
  authorization: "********",
  user-agent: "PostmanRuntime/7.13.0",
  accept: "*/*",
  cache-control: "no-cache",
  postman-token: "ebfa3211-958d-4042-ab6a-a488847fc2f7",
  host: "localhost",
  accept-encoding: "gzip, deflate",
  connection: "keep-alive"
}