curl --request POST \
  --url http://localhost:3000/v1/auth/pin/verify \
  --header 'Content-Type: application/json' \
  --data '
{
  "pin": "<string>"
}
'

{
  "success": true,
  "staff": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "first_name": "<string>",
    "last_name": "<string>",
    "email": "jsmith@example.com",
    "deputy_employee_id": 123,
    "pin": "<string>",
    "role": "<string>",
    "operational_units": [
      "<string>"
    ]
  }
}