Some of the recent (For about a month or two) signups to my app using Google login have Gmail addresses with the exact same format and they have no activity at all after the signup, so I suspect they are signups with test addresses or some fake accounts but my efforts to find out were unsuccessful so I am bringing it up to the S/O.
The format is: First name, Last name, and exact 5 digits of numbers. e.g., the Gmail addresses all look like below (They are made-up e-mail addresses for illustration, not actuals.):
michaeljordan.19961@gmail.com
lionelmessi.20091@gmail.com
justinbieber.02009@gmail.com
Does anyone know what is going on here? Thanks a lot in advance.