List project users

curl --request GET \
  --url https://api.lunary.ai/v1/external-users

{
  "total": 123,
  "page": 123,
  "limit": 123,
  "data": [
    {
      "id": "<string>",
      "createdAt": "2023-11-07T05:31:56Z",
      "externalId": "<string>",
      "lastSeen": "2023-11-07T05:31:56Z",
      "props": {},
      "cost": 123
    }
  ]
}