I am relatively new to Canvas Admin. Wondering what the best way to add Parent Observers to our classes would be? We roster Aeries to Canvas through OneRoster, does not look like it is an option to include Parent information as part of that API. Would be have to allow Open Registration for Observers, have teachers invite the parents, they reply with thir email etc. to create account? Or would it be better to see if OneRoster can include a parent contact endpoint to Canvas and create parent accounts for us in Canvas.