method assignRole is nod defiened

hello , i used spatie laravel permission package for assigning roles and permissions . i also add HasRolestrait to User model

when i want to assign a role to user with $user->assignRole('Super Admin') it got error

so what's the problem

BadMethodCallException: Call to undefined method App\Models\User::assingRole() in E:\xampp 8\htdocs\rcf\backend\src\vendor\laravel\framework\src\Illuminate\Support\Traits\ForwardsCalls.php:71

could someone help me ?