GitLab can be configured to require confirmation of a user's email address whenthe user signs up. When this setting is enabled, the user is unable to sign in untilthey confirm their email address.
**Sign-up Restrictions** and look for the **Send confirmation email on sign-up** option.<!-- ## TroubleshootingInclude any troubleshooting steps that you can foresee. If you know beforehand what issuesone might have when setting this up, or when something is changed, or on upgrading, it'simportant to describe those, too. Think of things that may go wrong and include them here.This is important to minimize requests for support, and to avoid doc comments withquestions that you know someone might ask.Each scenario can be a third-level heading, e.g. `### Getting error message X`.If you have none to add when creating a doc, leave this section in placebut commented out to help encourage others to add to it in the future. -->