32834217_as___Arts___Sciences_Computing__What_you_need_to_know
[Why it matters] All users — faculty, students and outside guests — need a PennKey username and password to log in. Faculty who don't yet have a PennKey should visit the PennKey site or consult with the support staff in their department. Library support staff can help create PennKeys for outside guests. Log in to Canvas at http://canvas.upenn.edu PennKey information Request a PennKey for a guest from outside of Penn [What you need to know] 
You need a PennKey to log in to Canvas
Things You Really Need to Know about Canvas | Arts & Sciences Computing
What you need to know