After the server restart, you can view the enabled Hub authentication on the Administration | Authentication page and manage the integration with Hub using the Administration | Hub Settings page.
The Hub plugin adds two JetBrains Hub authentication modules to TeamCity:
You can view the currently enabled authentication modules on the Administration | Authentication page.
Removing the JetBrains Hub modules will disable authentication via Hub.
If you are using an external provider to authenticate to JetBrains Hub (e.g. GitHub, Google, etc.), you will be able to log in to TeamCity. However, to log in to TeamCity from an IDE, you'll need to add credentials for your JetBrains Hub user (username and password) and use these credentials to authenticate to TeamCity from your IDE.
Enabling / Disabling integration with Hub
On the Administration | Hub Settings page provide the Hub URL of the following format
Сlick Register TeamCity service in Hub. >
Note that the Guest user in Hub needs to be allowed (unbanned) for the TeamCity service registration in Hub.
You will be redirected to the Services page in Hub. Verify the TeamCity Hub service using the Trust button.
After you trust the TeamCity service in Hub, return to the TeamCity Web interface to configure user synchronization.