Implement interface.

app/User.php

@@ -5,13 +5,16 @@ namespace App;
 use Illuminate\Auth\Authenticatable;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Auth\Passwords\CanResetPassword;
-use Illuminate\Foundation\Auth\Access\HasAbilities;
+use Illuminate\Foundation\Auth\Access\Authorizable;
 use Illuminate\Contracts\Auth\Authenticatable as AuthenticatableContract;
+use Illuminate\Contracts\Auth\Access\Authorizable as AuthorizableContract;
 use Illuminate\Contracts\Auth\CanResetPassword as CanResetPasswordContract;
 
-class User extends Model implements AuthenticatableContract, CanResetPasswordContract
+class User extends Model implements AuthenticatableContract,
+                                    AuthorizableContract,
+                                    CanResetPasswordContract
 {
-    use Authenticatable, CanResetPassword, HasAbilities;
+    use Authenticatable, Authorizable, CanResetPassword;
 
     /**
      * The database table used by the model.