make sure causer models can have ulids

[TowlieeNetworks]

I found out while testing this package that with the user model i have i will never correctly store the id and thus the causer relation.

The user model uses the HasUlids and the event was caused by the following code
activity() ->causedBy(user()) ->performedOn(user()) ->event('login') ->log('The user has logged in.');

i have tested this with multiple different users and this is the output in the database.

id: 2
log_name: default
description: The user has logged in.
subject_type: App\Models\User
event: login
subject_id: 1
causer_type: App\Models\User
causer_id: 1

id: 3
log_name: default
description: The user has logged in.
subject_type: App\Models\User
event: login
subject_id: 1
causer_type: App\Models\User
causer_id: 1

id: 4
log_name: default
description: The user has logged in.
subject_type: App\Models\User
event: login
subject_id: 1
causer_type: App\Models\User
causer_id: 1

id: 5
log_name: default
description: The user has logged in.
subject_type: App\Models\User
event: login
subject_id: 1
causer_type: App\Models\User
causer_id: 1

Am i doing something wrong or is this just not supported yet?