GET - https://subscribercrmapi.acamh.org/api/groupmember/contact/{contactId}

Lists all Group Members for a contact.

[
{
"Id": 1,
"GroupId": 1,
"ContactId": 1234,
"DateFrom": "2025-05-23T00:00:00+00:00",
"DateTo": null,
"OfficeId": 2,
"StatusId": 3,
"Reason": ""
},
{
"Id": 2,
"GroupId": 1,
"ContactId": 1234,
"DateFrom": "2025-07-23T00:00:00+00:00",
"DateTo": null,
"OfficeId": 2,
"StatusId": 3,
"Reason": ""
}
]