Twilio Authy adding user without phone number or email by scanning QR Code or manually entering key
96765
Generating (pseudo)random alpha-numeric strings
88114
What is the best way to add a user to the sudoer group?
12767
User recognition without cookies or local storage
112800
How do you disable anonymous login?
128678
Is it possible to get the User Id without the authorization?
11183
Auto-connect to hidden wireless without elevating privilege
69419
How to add a user without /home?
50260
Is there a new auto-login feature?
94559
An active access token must be used to query information about the current user
148899
Is there an option to create and Opt-in a user in the same API call?
153257
Automatically adding user and password to openvpn script
80331
Automated way to verify user identity
140528
How to Prevent SPAM without CAPTCHAs or a Centrally managed system (e.g. akismet)
32925
What steps to add a user to a system without using useradd/adduser?
33564
How to programmatically login/authenticate a user?
15998
Email authentication without modifying DNS records
15223
Is it OK to require users to have a third party login account?