Pop-up Login Form
The Flatstore template has built-in pop-up log in form module position which you may want to use to allow your customers to quickly log in to your site.
To use Pop-up Login Form position simply publish your login form into loginform module position.
After you customer will login he will get an access to his account also using Pop-up Login Form.
You will find the Pop-up Login Form module at the top of the demo of this template.