Handle Flinks GetAccountsDetail webhook payloads

Example request

{
  "HttpStatusCode": 200,
  "RequestId": "22178382-31ee-485c-a750-c20929b6a344",
  "Login": {
    "Id": "5602459c-f6d0-4ca0-6750-08dccdcadcc0"
  },
  "InstitutionName": "FlinksCapital",
  "InstitutionId": 14,
  "Institution": "FlinksCapital"
}