How I reinvented a wheel: Building SMS auth in Vertx with Java

A SMS authentication is a form of a password less authentication. Users log in with its username and then receives a confirmation code on a mobile phone that he/she should enter in order to receive an access. There are different opinions against this method of authentication, however you could not argue against the fact that for mobile apps it is an easiest and most logical for users way to login. Many mobile apps, like taxi, delivery etc. use such method a lot. read more