Idea of Login Rounded Icon
It's a logo of login rounded reduced to an image of an arrow pointed west. The logo is enclosed by a circle that borders it. It reminds me of the back icon on a browser, except a circle is around it.
This page contains the Login Rounded vector icon, as well as variations of this icon in different visual styles, and related icons. All icons are in the flat vector style, however, differ by the line thickness, fill, and corner radius.