Laravel 5.1 create user won't insert added column?

I have added a column for activation token in my users table and I want to add this random string when inserting new users.

So in my AuthController i have this:

protected function create(array $data)
{
    return User::create([
        'name' => $data['name'],
        'email' => $data['email'],
        'password' => bcrypt($data['password']),
        'activation_token' => str_random(60),
    ]);
}

The user get's registered but the activation_token column remains empty??? What am I doing wrong?

via Chebli Mohamed