Issue 1: Unable to create a user
**Possible causes**:
- Username or email address already exists
- Password does not meet the requirements
- Required fields are not filled in
**Solution**:
- Check if the username and email address are repeated
- Ensure that the password meets the complexity requirements
- Fill in all required fields
Issue 2: User cannot log in
**Possible causes**:
- User status is disabled
- Wrong password
- Account is locked
**Solution**:
- Check user status and enable
- Reset user password
- Check account lock status