Incorporated the following checks every time the app starts.
o Check whether the sponsor subscription is still active or has expired.
o Check whether the agent code is still valid or has been invalidated.
If the checks uncover a sponsor subscription has expired OR the agent code is no longer valid, direct the user to the login screen to prompt for a new
agent code. This omission in the previous release has led to the app behaving erratically and crippling its map operation.