Dear Axe,
Please follow the operations:
1. Log in to DeviceManager.
2. Choose Provisioning > User Authentication > Local Authentication User Group.
3. Select Administrators in Local Authentication User Group.

4. Add a user to the local authentication user group.
Click the Local Authentication User tab.
Click Add. The Add User dialog box is displayed.
Select the user that you want to add and click OK.
The Execution Result dialog box is displayed.
Click Close.
I hope this can help you.