I'm developing Experience Builder Widgets during the day at work and I cannot access the community or github from work. Still, I would like to contribute to the community on my own time and equipment because I have some ideas to enhance some of the Esri out-of-the-box widgets for Experience Builder. I'd like to fork some of those widgets and push my enhancements back up to github for the community. I downloaded Experience Builder developers edition and ran it, only to realize I have no Portal / Organization to login to. Now what? Is it impossible to do this?
