Once you have installed and configured the rights extension in your application, you can change the table name from 'User' to any table name you want and similarly for 'username' column to any other column name.
This tutorial is not about allowing users to sign into your application by using any of the OAuth providers available with the official yii2-authclient extension, it is about how to interact with your Twitter account, the one you set for your Yii2 app to promote your site, using the Single Access Token technique.
This wiki will explain how you can use the Field range extension with multiple Bootstrap form layouts (vertical or horizontal). You maybe aware, that the yii2-field-range extension enables you to easily setup ActiveField range fields with Bootstrap styling. You basically can setup two attributes joined together like a single field with combined validation error block.
I assume you are familiar with accessControl standard filter. It allows you to separate privileges to run some action from action code itself. There is however one problem with most common usage - you cannot use bizRules, at least based on some parameters passed to 'checkAccess' just because it is hard to pass them in accessRules() result.