Create a registration controller for customize devise permit parameters
user
```ruby
class RegistrationsController < Devise::RegistrationsController

    private

    def sign_up_params
        params.require(:user).permit(:first_name, :email, :password, :password_confirmation)
    end

    def account_update_params
        params.require(:user).permit(:first_name, :last_name, :email, :password, :password_confirmation, :current_password, :avatar, :age, :country)
    end

end
```
assistant