Not all usernames from Drupal can be used for creating users in GitLab. Here is the error message when an invalid username is being used:
Gitlab\Exception\ValidationFailedException: "username" can only include non-accented letters, digits, '_', '-' and '.'.
It must not start with '-', end in '.', '.git', or '.atom'., "username" can contain only letters, digits, '_', '-' and '.'.
Cannot start with '-' or end in '.', '.git' or '.atom'.
Also, the username admin is not permitted.
We need to sanitize usernames before sync.
Active
1.0
Code
Fixed by 🐛 User names may be a problem for certain backends Active
Automatically closed - issue fixed for 2 weeks with no activity.