curl --request GET \
  --url https://api.councilgpt.com/api/v1/vault/projects/{project_id}/users \
  --header 'Authorization: Bearer <token>'

{
  "status": "COMPLETED",
  "data": {
    "project_id": "12345678-1234-5678-1234-567812345678",
    "users": [
      {
        "user_id": "aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee",
        "email": "[email protected]",
        "name": "Alice Admin",
        "access_level": "MANAGE"
      },
      {
        "user_id": "11111111-2222-3333-4444-555566667777",
        "email": "[email protected]",
        "name": "Bob Reviewer",
        "access_level": "READ"
      }
    ]
  }
}