Updated By should not be updated if there is no user authenticated

[22Nick22]

Summary of problem or feature request

Setting the updated_by field in a Factory has no effect as the value is overwritten by null on save due to there being no currently authenticated user.

Code snippet of problem

    public function definition()
    {
        return [
            'name' => $this->faker->name,
            'email' => $this->faker->unique()->safeEmail,
            'email_verified_at' => now(),
            'password' => '$2y$10$92IXUNpkjO0rOQ5byMi.Ye4oKoEa3Ro9llC/.og/at2.uheWG/igi', // password
            'remember_token' => Str::random(10),
            'created_by' => 3, // Stamped as 3
            'updated_by' => 3, // Stamped as NULL
        ];
    }

System details

• Operating System - PopOS
• PHP Version - 7.4.9
• Laravel Version - 8.21.0
• Laravel-Auditable Version - 4.3.0