General Questions About Git

[AAPS]

As an amateur, there are a couple things that I just don’t understand about git. I’ve decided to clone my fork of the project to the desktop on my pi, so that I will have another version of my MagicMirror on GitHub. However every time I make a change, it doesn’t show up in git status. When I do git push it asks for my username and password, but still does not work. Is there a way to log on to my account from the command prompt so I can complete these actions?