curl --request POST \
  --url http://localhost:3000/v1/scheduling/deputy/generate-pins

{
  "success": true,
  "results": [
    {
      "staffId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "email": "<string>",
      "name": "<string>",
      "pin": "<string>",
      "status": "<string>"
    }
  ],
  "errors": [
    {
      "error": "<string>",
      "deputyId": 123,
      "name": "<string>",
      "email": "<string>"
    }
  ],
  "summary": {
    "staff_without_pins": 123,
    "pins_generated": 123,
    "errors": 123
  },
  "error": "<string>"
}