How to programmatically authenticate a user
33564
How to programmatically login/authenticate a user?
108356
Use of Custom Object to authenticate Users
144101
Programmatically create a user account
84219
Creating a secure login using sessions and cookies in PHP
127559
Password Authentication c++
55093
How can I add a Stack Exchange login to my preexisting account?
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Authentication token manipulation error
58025
Authentication filter and servlet for login
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"Requires a valid user is specified ..." error when using getCount
148899
Is there an option to create and Opt-in a user in the same API call?
92640
How to handle user authentication persistance in IOS?
94148
How can I make SMTP authenticated in C#
110486
How to do delegated authentication in salesforce
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Get the value of a custom user field
12767
User recognition without cookies or local storage
143086
Cannot authenticate without a password
97595
Initiate an oAuth flow via an Auth Provider