Adding and deleting users from a list connected to firebase. Syncs a user list from cloud to the app. One can add and delete users. Updating user may be entered later. Also uses AlertDialog boxes :https://api.flutter.dev/flutter/material/AlertDialog-class.html
Also check:https://youtu.be/ipa3T_gVe8U?list=PL_8L2T-DXESDdEsh4ELI2DUUtq9o6Nd3M and https://youtu.be/a6c0R6pcbU8.