User Login in Quanta
In a Quanta application, every registered user (that's a subfolder of the _users folder) owning a password, can do a login, identifying himself in the system and gaining the roles that have been assigned to him.
The LOGIN Qtag
To create a login button, you'll normally use a [LOGIN] qTag. It will automatically render as a "Login" or "Logout" link, accordingly with the logged / unlogged status of the current user.
The [LOGIN] qTag is merely an extension of the [LINK] qTag, to which it adds a specific class.
So you can use all the attributes you would normally us in a [LINK] such, as tooltip.
[LOGIN|tooltip=Hey! I am a login button]