Returns the group plan specified by unique identifier
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
The unique identifier of the group plan you would like to view
"31559b4b-e45a-4df8-84f6-2220d7ed0c3a"
The relative date on which to view the state of the record
Successful Response - Returns matching Group Plan
Group plan associated to a line of coverage