The user list cannot be sort by alphabetical order as we return the user list ordered by the users created_at attribute. However, it is not the same for channel member lists. For Super Groups it is possible to get members sorted alphabetically for larger channels.
Hello @Sercan_Demir,
It is not the same for channel member lists. For Group channel it is possible to get members sorted alphabetically. Please refer below document and let me know if this helps.