Subscriber login portals--is this built in the plugin, or is this extra code I need to implement?

Hi guys—I'm a total amateur when it comes to coding in general...what I'm wondering is whether it's possible to set-up a subscriber login widget as part of the membership process. I've got my payment gateways, but would like a way for subscribers to log-in from anywhere for access to content after they sign up. For now, Paypal just confirms it, but I'm unclear as to build a log-in into the process (within a native app, for example). I'm sure this is just something I've overlooked or missed completely! I'd really love to have a clean login bar somewhere on the homepage but am totally lost.

Any and all advice is greatly appreciated!
Cassandra