How can I determine if the same user is registering again in my application?
125941
Prevent users from starting multiple accounts?
28901
How to get the value of previous and current profile assigned to a user using trigger?
154859
Are multiple-users protected from each other differently than apps?
84516
Getting the real name of an user
57586
Duplicate an Oracle database user
20342
Checking the way to stop duplicate names - validation rules or triggers
34997
Multiple applications using same login database logging each other out
106361
How to Return to an already open application when a user tries to open a new instance if same version?
35742
Duplicate notifications
95308
Do iOS app visits count to your consecutive visits
19360
Default App Association set by user resets after next logon
132609
How to automatically keep user remembered in Devise
55981
How to determine if remoting channel is already registered
111459
Is there any way to detected the user who is "Logged in as user" using Apex
153545
iOS unique user identifier
156230
How to force users to re-authenticate on specific pages?
18745
`who am i` after `su` not showing new user id?