user_list_query library Null safety

Classes

ApplicationUserListQuery
A query object to retrieve list of user on current application.
UserListQuery
#################### SECURITY TIPS #################### Before launching, you should review "Allow retrieving user list from SDK" under ⚙️ Sendbird Dashboard ->Settings -> Security. It's turned on at first to simplify running samples and implementing your first code. Most apps will want to disable "Allow retrieving user list from SDK" as that could possibly expose user information #################### SECURITY TIPS #################### A query object to retrieve user list