post https://api-v3.authenticating.com/user/verifyPhone
Use Verify phone function to 2FA any phone number in the world.
The Verify Phone function starts the phone number verification process.
A phone number can be included in the API call, if already not in the user object.
On initiating this function an SMS is sent to the user.
Once the user receives the SMS with the code, they can enter it into a text field. Subsequently, an API call has to be made to Verify Phone Code to verify the submitted code's authenticity.