... and expand the tx_sv_authbase class with the support for user authentication via “username” or “email” fields from the fe_users table. We are going to start by creating a new basic plug-in in a kickstarter, or by selecting another plug-in that we will use for user authentication. A function for creating a basic service class in inbuilt in the kickstarter. However, to make the process clearer, I omitted this...