curl --request POST \
  --url https://connect.withvayu.com/customer-relations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "vayuParentCustomerId": "<string>",
  "vayuChildCustomerId": "<string>"
}'

{
  "customerRelation": {
    "vayuParentCustomerId": "<string>",
    "vayuChildCustomerId": "<string>",
    "id": "<string>",
    "createdAt": "2023-11-07T05:31:56Z",
    "updatedAt": "2023-11-07T05:31:56Z"
  }
}