Route [admin] not defined. code example

Example 1: Route [login] not defined.Route [login] not defined.

Use Postman and set the Header `Accept: application/json` otherwise Laravel
Passport would never know it's an API client and thus redirect to a /login 
page for the web.

Example 2: Route [login] not defined.Route [login] not defined.

To check either request includes token or not make your own middleware.

php artisan make:middleware CheckApiToken

public function handle($request, Closure $next)
{
    if(!empty(trim($request->input('api_token')))){

        $is_exists = User::where('id' , Auth::guard('api')->id())->exists();
        if($is_exists){
            return $next($request);
        }
    }
        return response()->json('Invalid Token', 401);
}