curl --request POST \
  --url http://localhost:8080/users/{user_id}/insurance_policies/preview \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "benefit_id": "<string>",
  "dependant_ids": [
    "<string>"
  ]
}
'

{
  "benefit_name": "<string>",
  "coverage_amount": {
    "currency": "INR",
    "value": 123
  },
  "duration_months": 123,
  "members": [
    {
      "age": 123,
      "dependant_id": "<string>",
      "first_name": "<string>",
      "gender": "male",
      "last_name": "<string>",
      "relationship": "self",
      "salutation": "mr"
    }
  ],
  "total_daily_premium": {
    "currency": "INR",
    "value": 123
  },
  "total_monthly_premium": {
    "currency": "INR",
    "value": 123
  }
}