In order to show the extension main feature: the single sign on process, you should log into the front-end with these credentials:
- uer: joomgapps
- password: joomgapps.
When you are loggued into the front-end, you will be able to access to the three main applications by Google® GMail, Doc, y Calendar
Click in the logotypes to check it
If you want to check users sincronization in the back-end, you should download and install the component in your own website
In documentation section there are a tutorial which show this feature