Auto Logout for opencart is a module which work with vqmod and there is no need to change in core files of opencart.
It compatible with default theme . To work it with other theme it need to create some customization in this as vqmod is depend on html structure. Please contact us on support and we will help you make it compatible with your theme.

Features:
-----------------------------------------
1. Admin can set time limit (in minute ) in admin panel. If not set then it logout the user in one minute idle time.
2. It read only idle time, if mouse move or key press by customer on the site it will recount the time period.
3. Admin can set redirect url. If admin need to redirect user after logout to some other page then he can define it on backend.

Pre-requistes:
- vQmod installed

Installation:
1. unzip the folder and upload files of upload folder on root directory by ftp.
2. There are 3 folder will will merge files. there will be no replacement of core files.
3. Go to admin --> Extensions --> Modules --> Install Auto Logout. (This will create the required database)
4. Go to System --> setting --> There are 2 new fields added after comments field.
5. Enter Auto Logout Redirect Url field. If want to redirect user to some page after logout.
6. Auto Logout Time: In this field enter a number in minute, after that you need to logout Idle user.

for any added feature or customizaion you can contact on support (hkdev1987@gmail.com)