Hello,
When the user hits a page that requires login to view, the plugin should redirect to ‘wp-login.php’, not ‘wp-admin’. Once the user logs in on ‘wp-login.php’, plugin will redirect the user back to the page they attempted to view before they logged in.
It is not clear what exactly you mean by “front login”, but if you’re asking to redirect the user to the front page either instead of the login page, or after the user logs in, that is not supported.
However, when ‘wp-login.php’ renders, it does include a link back to the home page below the login box that says “<- Back to [site name]”.