curl --request GET \
  --url https://api.hierarch.io/v1/assignment/get/{company_slug}/{assignment_id}/ \
  --header 'token: <api-key>'

{
  "assignment": {
    "id": 123,
    "title": "<string>",
    "description": "<string>",
    "status": "<string>",
    "remarks": "<string>",
    "product": {
      "id": 123,
      "name": "<string>"
    },
    "pipeline": {
      "id": 123,
      "name": "<string>"
    }
  },
  "handbooks": [
    {
      "id": 123,
      "title": "<string>",
      "slug": "<string>"
    }
  ],
  "clients": [
    {
      "id": 123,
      "first_name": "<string>",
      "last_name": "<string>",
      "profile_photo": "<string>"
    }
  ],
  "personnel": [
    {
      "id": 123,
      "first_name": "<string>",
      "last_name": "<string>",
      "role_name": "<string>"
    }
  ]
}