Handle Struct Arguments Consistently

[kyleboe]

In many cases, we want to accept either a struct or an id as an argument to an function. I'm curious if there is a sane, reusable pattern that can be used instead of inconsistent usage of function clauses.

For example, passing the Message struct as the first argument to message-related API calls sometimes pattern matches the relevant keys off of the struct (id and channel_id) and in other times, there is no function clause available.

This may be not worth the amount of complexity needed to abstract this kind of functionality, but we can discuss below.