title: RBAC for basic yii2 template
body: <p>i want to create an application where only admin can perform all the crud operations but other users can only create and update posts.  I did find tutorials based on rbac but only for advanced template but i am using the basic template. I also followed the yii2 guide but i did not understood it very well like executing ./yii rbac/init console command. How do i do it?</p>