How to check two input is already exist in laravel?

I have roles tables. When storing new data in roles table I need to check role_name and role_id is already exist. How can check in laravel?

id role_name role_id 1 admin 1 2 user 2

RoleRequest.php

class RoleRequest extends FormRequest
{

    public function authorize()
    {
        return true;
    }


    public function rules()
    {
        return [
            'role_name' => 'required|unique:role|max:50',
            'role_id'  => 'required|unique:role|max:10'
        ];
    }
}

via sam sam