GET api/2.0/settings/telegramisconnected
Checks if the user has connected to TelegramBot.
This method doesn't have any parameters.
GET api/2.0/settings/telegramisconnected
Host: yourportal.onlyoffice.com
Content-Type: application/json
Accept: application/json
Operation result: 0 - not connected, 1 - connected, 2 - awaiting confirmation