Understand how users are represented internally in Drupal.
Understand how to store information associated with a user in several ways.
Hook into the user registration process to obtain more information from a registering user.
Hook into the user login process to run your own code at user login time.
Understand how external user authentication works.
Implement your own external authentication module.
For more information on external authentication, see the openid.module (part of the Drupal core) or the contributed pubcookie.module.
KeywordsProfile Field User Account User Session Anonymous User User Role
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