Retrieve a group invite

curl --request GET \
  --url https://api.rownd.io/applications/{app}/groups/{group}/invites/{invite} \
  --header 'x-rownd-app-key: <api-key>' \
  --header 'x-rownd-app-secret: <api-key>'

{
  "id": "c92kd7td7z4myhu7z5y637cp",
  "group_id": "group_zjca79svvbqfeilwr8httcal",
  "roles": [
    "editor"
  ],
  "state": "pending",
  "email": "randy@foo.com",
  "phone": 19199993333,
  "user_id": "user_mni5316glfgwtgljboxrv2it",
  "user_lookup_value": "randy@foo.com",
  "redirect_url": "/somewhere/on/my/site#",
  "app_variant_id": "<string>",
  "created_at": "2023-11-07T05:31:56Z",
  "created_by": "user_t6ftnnmw55pamuhfo9xvw0yl",
  "accepted_by": "user_vgzrk03xpenj6td8vwi9crh4",
  "ensured_user_id": "<string>"
}