To join a life group you'll need to create an account, first. It's a quick process. If you already have an account, you can log in below.
your username is not case sensitive, so don't worry if your phone does some goofy auto capitalization

Forgot Your Password? | Need To Create An Account?
or Login with Google Login with Facebook
if you want to setup easy logins via google/facebook, go to settings once you are logged in