GitLab requires unique identifiers for user accounts and prevents identifier reuse.
An unique identifier allows for every user account's action to be logically separated and uniquely identified. It helps use detected and prevent abuse and suspicious activity.
An unique identifier (UID) is a numeric and/or alphanumeric string that is associated with a single user account within a given system. This control applies to any authentication and authorization mechanism (e.g., uniqueness of database fields such as
user_id) used within the production environment.
IT Operations Team
Non-public information relating to this security control as well as links to the work associated with various phases of project work can be found in the Unique Identifiers control issue.