Add auto_link_user Omniauth configuration setting

What does this MR do?

Adds an auto_link_user setting to the OmniAuth integrations, allowing current GitLab users to be automatically linked to their corresponding OmniAuth identities, as long as the email matches.

Set to false by default, and will apply the auto_link_saml_user behavior to all OmniAuth integrations.


Does this MR meet the acceptance criteria?


Availability and Testing


If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

  • Label as security and @ mention @gitlab-com/gl-security/appsec
  • The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
  • Security reports checked/validated by a reviewer from the AppSec team

Closes #24327 (closed)

Edited by Blair Lunceford

Merge request reports