curl --request GET \
  --url http://localhost:3000/v1/admin/staff/{id}

{
  "staff": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "email": "<string>",
    "first_name": "<string>",
    "last_name": "<string>",
    "deputy_employee_id": 123,
    "is_active": true,
    "operational_units": [
      "<string>"
    ],
    "role_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "role": "<string>",
    "role_description": "<string>",
    "phone": "<string>"
  }
}