there is app in creator

2 sales users - user_1 and user_2

1 admin user - user_admin

each user can open and modify entry in creator's app

how can i check which of user_1 or user_2 has at last modified entry?

for example, i can make field in which username will be filled (how?)

and how can make, so that field will be filled only with user_1 or user_2 usernames, but not with user_admin username?