Hi,
Something here might help:
Export a list of users and their access levels
https://learn.microsoft.com/en-us/azure/devops/organizations/security/export-users-audit-log
If you have any more questions related to AzureDevOps, I suggest you ask in the dedicated forum over here:
https://developercommunity.visualstudio.com/spaces/21/index.html
Best regards,
Leon