Assign role after login

[fornaserofranco]

I am implementing roles in a website where there is already a database with many users, so assigning roles one by one is not feasible. It occurred to me to assign a role to the user after they log in, but I can't get it to work. Could you tell me what is wrong with my code?

This is my login controller

if (Auth::attempt(['email' => $request->email, 'password' => $request->password,'codigocli'=>$request->codigocli])) 
        {   
            $user = User::where('id', '=', Auth::user()->id)
                        ->first();

            switch($user->codigocli){
                case 0:
                    $user->assignRole('vendedor');
                    break;
                case 7777:
                    $user->assignRole('admin');
                    break;
                default:
                    $user->assignRole('cliente');
                    break;
            }

            return redirect()->route('index');
        }

The error I get is:

I already have HasRole in my model user and was able to assign a role to a user in a seeder the way I'm trying to do now

[erikn69]

Really weird
https://spatie.be/docs/laravel-permission/v5/basic-usage/basic-usage
Take a look on HasRole again