curl --request GET \
  --url https://api.pagecall.com/v1/rooms/{room_id}/members/{member_id} \
  --header 'Authorization: Bearer <token>'

{
  "member": {
    "id": "642d103ce95bc9dc22ef789f",
    "user_id": "external_user_102932",
    "room_id": "000585f36eed9e8fb6b655b4",
    "type": "guest"
  }
}