All of the documentation in the Student section still applies to the GoReact app in Canvas, the only thing that is different is where you will access the course content.
If your instructor is using Canvas, then you cannot access your course directly at goreact.com. Instead, all you need to do is log into Canvas, open your course, and open an assignment that uses GoReact.
Registering for GoReact
The first time you open a GoReact assignment in Canvas, you may be prompted to pay with a card or enter an access code (unless your organization has set up a different method of payment or you have purchased a 5-year plan). Select the corresponding button and enter your card information or access code, and then click "Submit."
Submitting a video
To submit a video to GoReact, just open the applicable assignment in Canvas, and click the "Start Assignment" button to record or upload your video.