curl --request POST \
  --url https://upay-sistema-api.onrender.com/api/clients \
  --header 'API-Key: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "email": "jsmith@example.com",
  "document": "<string>",
  "phone": "<string>"
}
'

{
  "message": "<string>",
  "client": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "name": "<string>",
    "email": "jsmith@example.com",
    "document": "<string>",
    "phone": "<string>",
    "createdAt": "2023-11-07T05:31:56Z",
    "updatedAt": "2023-11-07T05:31:56Z"
  }
}