Check if the model correctly implements the trait.

[MathieuMaas]

In my auth.php I got multiple guards example:

    'guards' => [
        'web' => [
            'driver'   => 'session',
            'provider' => 'users',
        ],

        'member' => [
            'driver'   => 'session',
            'provider' => 'members',
.....

For now I only want to log the users data so I applied the trait to the User::class. Now when logging in as member. I get the following error: call to undefined method App\Models\Member::authentications(). This is because my Member::class does not have the trait implemented. There is no way to configure this either. So I added this check. I could add it do all the listeners or do you rather have a config with the classes into it that should be logged?

[dimitri-koenig]

@rappasoft Could you please review this PR and possibly merge it and make a new release quickly? That would be really helpful since not checking this makes it really cumberstone to use it with some other 3rd party packages which use their own user model and fire login events. Thx a lot :-)