curl --request POST \
  --url https://core-proxy-service-w34nvoxnwq-uc.a.run.app/proxy_api/v1/basic/users/add_balance \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "username": "<string>",
  "data_gb": 123
}
'

{
  "username": "<string>",
  "user_id": "<string>",
  "password": "<string>",
  "data_gb": 123,
  "data_usage": 123,
  "status": "<string>",
  "whitelisted_ips": [
    "<string>"
  ],
  "date_created": "2023-11-07T05:31:56Z"
}