I was also looking for the answer, but I tried it out. I just used Google's gmail mailbox. Fill in and submit and then receive the verification code. Adopt it. Any other problems can be solved here .
Call on the number for best solutions +1855(485)0407....
customer service +1855(485)0407...
"Not able to register with a new phone number or email id, it says "user not registered" for any or every data I input! please help!"