Create Next Of Kin

curl --request POST \
  --url https://api.example.com/api/v1/crew/users/{user_id}/next-of-kin \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "relationship": "<string>",
  "fullName": "<string>",
  "phone": "<string>",
  "email": "<string>",
  "address": "<string>"
}
'

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "relationship": "<string>",
  "fullName": "<string>",
  "createdAt": "2023-11-07T05:31:56Z",
  "updatedAt": "2023-11-07T05:31:56Z",
  "phone": "<string>",
  "email": "<string>",
  "address": "<string>"
}