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Jenkins lets you identify and manage users in a number of ways, ranging from a simple, built-in user database suitable for small teams to integration with enterprise directories, with many other options in between.
The easiest way to manage user accounts in Jenkins is to use Jenkins’s internal user database. This is a good option if you want to keep things simple, as very little setup or configuration is required. Users who need to log on to the Jenkins server can sign up and create an account for themselves, and, depending on the security model chosen, an administrator can then decide what these users are allowed to do.