I'd like to create a template that lets visitors either a) register a new account or b) sign in to an existing account.
There's a sample public registration form here: http://buildwithcraft.com/docs/templating/user-registration-form.
However, I can't find any examples of how to enable a visitor with an existing account to sign into it.
Sorry if I'm missing an obvious link somewhere.
How do you do this? Thanks!