jordanjay29 I don't believe there are at this point. Feel free to make a request in Feedback > Features, or in Resources if you're offering a financial bounty.
Ralkage WhatsApp does not have a publicly available API. All attempts to reverse engineer the application/app itself has lead to basic functionality such as sending texts. There is no current way to achieve OAuth with WhatsApp to date.
amrendra It's available now: https://developers.facebook.com/docs/whatsapp/api/users https://tech.goibibo.com/introducing-login-with-whatsapp-on-goibibo-b2e56ebbb867