Changing Laravel 5.4 password encryption and table column names

Question

I am trying to integrate the auth in laravel 5.4 within an existing database where the user and password fields have other names (memberid, passwordnew_enc

Answer 1

upful's code worked for me (in Laravel 5.4)

But I needed to add:

use Illuminate\Contracts\Auth\Authenticatable as UserContract;

in the CustomUserProvider class.