The GET /api/isTimeBasedSetUp API method checks whether a user has already configured Time-Based Multi-Factor Authentication (MFA) for their account. When invoked, the API returns a boolean value, indicating whether the Time-Based token setup has been completed. If the response is true, the user has successfully set up Time-Based MFA. If the response is false, additional MFA setup is required. This endpoint ensures that users have the appropriate level of security configured and helps guide them through additional steps if needed.