Authenticate extends Middleware redirect me if i have permission - laravel

Question

Hello please can explain me why it happedned . i hve make middleware and was work ok but suddenly stop and redirect me any way problem in method where Authenticate .php
class Authenticate extends Middleware
{
/**
* Get the path the user should be redirected to when they are not authenticated.
*
* #param \Illuminate\Http\Request $request
* #return string|null
*/
protected function redirectTo($request)
{
if (! $request->expectsJson()) {
return route('login');
}
}
}
this return me to login if i logged not allow for user he have permisson to go this
middleware
class AdminMiddleware
{
/**
* Handle an incoming request.
*
* #param \Illuminate\Http\Request $request
* #param \Closure(\Illuminate\Http\Request): (\Illuminate\Http\Response|\Illuminate\Http\RedirectResponse) $next
* #return \Illuminate\Http\Response|\Illuminate\Http\RedirectResponse
*/
public function handle(Request $request, Closure $next)
{
if (Auth::check()){
if (Auth::user()->user_type == 1){ //Any Manger Can Access only Not Users
return $next($request);
}else{
return redirect()->back();
// abort(403);
}
}else{
return redirect()->back();
}
}
}
and user_type == 1 was try in middle ware dd(Auth::user()); but if put it in side method redirectTo
dd(Auth::user());
return info bout user but not return nothing direct go to login in Authenticate ,
Route::group(['middleware' => 'auth:admin'], function () {
Route::get('admin/dashboard', function () {
return view('admin.index');
})->name('admin.dashboard');
and befor it was work ok . what problem !