API Routes saying 405 Method not allowed

Error says that the GET Method is not supported but the method registered is a route method. I can't seem to figure out what exactly is going on.

api.php file

Route::post('register', RegistrationController::class)->name('api.register');
Route::post('login', LoginController::class)->name('api.login');

This is the error I get in postman:

{
  "message": "The GET method is not supported for this route. Supported methods: POST.",
  "exception": "Symfony\Component\HttpKernel\Exception\MethodNotAllowedHttpException",
  "file": "/Users/delaakakpo/Projects/afap-ims/vendor/laravel/framework/src/Illuminate/Routing/AbstractRouteCollection.php",
  "line": 117,
  "trace": [
    {
      "file": "/Users/delaakakpo/Projects/afap-ims/vendor/laravel/framework/src/Illuminate/Routing/AbstractRouteCollection.php",
      "line": 103,
      "function": "methodNotAllowed",
      "class": "Illuminate\Routing\AbstractRouteCollection",
      "type": "->"
    },
}

Here's an image of the request in insomnia:

https://imgur.com/a/wBcZQwH