curl --request GET \
  --url http://localhost:8080/users/{user_id}/insurance_policies/{insurance_policy_id}/details

{
  "benefit": {
    "benefit_details": {
      "description": "<string>"
    },
    "name": "<string>",
    "provider_id": "<string>",
    "provider_name": "<string>"
  },
  "insurance_policy": {
    "benefit_id": "<string>",
    "benefit_name": "<string>",
    "created_at": "<string>",
    "dependant_ids": [
      "<string>"
    ],
    "dependants": [
      {
        "first_name": "<string>",
        "id": "<string>",
        "last_name": "<string>"
      }
    ],
    "id": "<string>",
    "last_modified_at": "<string>",
    "plan_code": "<string>",
    "premium_amounts": {
      "annual": {
        "value": 123
      },
      "daily": {
        "value": 123
      },
      "sponsor_contribution": {
        "value": 123
      }
    },
    "primary_member": {
      "first_name": "<string>",
      "id": "012345678901",
      "last_name": "<string>"
    },
    "primary_user_id": "012345678901",
    "questionnaire": {
      "questions": [
        {
          "answer": true,
          "question": "<string>"
        }
      ]
    },
    "end_date": "2027-01-15",
    "external_policy_id": "<string>",
    "metadata": {
      "provider_metadata": {}
    },
    "nominee_details": {
      "dependant_id": "<string>"
    },
    "start_date": "2026-01-15"
  }
}