Yii2: Creating Multiple User Component

http://visitmeifyoulike.blogspot.in/2015/01/yii2-creating-multiple-user-component.html

http://webtips.krajee.com/different-backend-frontend-sessions-yii-advanced-app/

http://www.yiiframework.com/wiki/814/guide-how-to-actually-separate-frontend-user-and-backend-admin-on-yii2-advanced/