After joining a channel, how do I get a list of usernames?

Im trying `connection.names()` after I join the channel (run the join function) but its returning None

Start by reproducing the reported sequence: join a channel, then call connection.names(), and inspect the returned value. Trace the join and names entry points to determine whether the behavior is a bug or an API misunderstanding; done means establishing the supported way to retrieve usernames and covering the behavior with an appropriate test or documentation.

Written by the indexing model from the issue text.