Remove login from Chrome extension?

Remove login from Chrome extension?

First off, the code blocks on the site were acting wonky for me, so I used
pastebin instead. Sorry :X Here you go
Basically, this is a Google Chrome extension which requires a login to use
the rest of the features. My friend has given me the challenge of removing
the login and make it possible to simply run the extension and use all the
features. I have tried simply removing the bits of code involving
"userEmail" and the "Registered," and the login screen was removed.
However, the extension did not work correctly, as the start button refused
to do anything.
So my goal as said before is to remove the login screen. By the way, this
is one file within the extension. There are other files, but I believe
this is the only one which deals with logging in. If you feel like you
need the rest of the files of the extension, it is found here.
If you feel like you actually need the extension itself, the name is just
let me know. Thanks in advance for all help given, whether it be giving
ideas or modifying the code yourselves!