I have enabled my Bot on WhatsApp, Viber & Telegram.
I could retrieve the WhatsApp User’s Mobile Number using the ‘app.sender()’ but the same isn’t applicable for Viber or Telegram as they have a unique User ID.
PFB Screenshots of the same.
I need to know the Mobile Number of Viber & Telegram Users for enabling services like OTP, etc.
Kindly let me know a way to get this done.
Thanks in advance.