Requires a sms module from Remonline

Good afternoon
There is a system: https://remonline.ru/integrations/sms-mailing-serv...
You want to develop integration to send Sms through Startsend.ru

The API is described here:
There are examples of ready-made code to send a text message: https://github.com/sms-by/api-for-sms.by