The callers either set a default limit or manually handle a None-limit later on (by setting a default value). Update the callers to always instantiate PaginationConfig with a default limit and then assume the limit is non-None.
_check_sigs_and_hash_and_fetch
knock_state_events
knock_room_state
generate_short_term_login_token
create_login_token
get_users_in_room
EventFormatVersions
is_mine_id