register Clan Callback
Registers a callback for clan-related events.
Parameters
event
The monitored event for which the callback is registered.
callback
The callback function to be invoked when the event occurs.
Registers a callback for clan-related events with an iterable callback function.
Parameters
event
The monitored event for which the callback is registered.
callback
The callback function to be invoked when the event occurs, taking two Clan objects and an additional ClanMember as parameters.