All the methods defined in an abstract class should be declared as abstract. code example
Example: Class must be declared abstract or implement methods 'hasVerifiedEmail'
You need to either extend Illuminate\Foundation\Auth\User instead of
Illuminate\Database\Eloquent\Model, or use Illuminate\Auth\Authenticatable
trait in your class
You need to extend Illuminate\Foundation\Auth\User like this
use Illuminate\Foundation\Auth\User as Authenticatable;
class User extends Authenticatable
{
}