How do I access to my Whatsapp backup in Google Drive? My phone was stolen and I was unable to reclaim my number from my telco. Therefore I'm not able to login to Whatsapp with my stolen number. There are very important messages and contacts that I have to retrieve, and I knew that the backups were in Google Drive, but I can't locate the backup file. Any help that I can retrieve my chat history from Google Drive?
There are commercial Products that claim that they are able to extract Whatsapp backups from Google Drive:

Elcomsoft Explorer for WhatsApp

Extract and Decrypt Android WhatsApp Backups from Google Account