Go to Admin and then to Developer Keys. Select the button Add developer key to add a key:
The Key name should be Peergrade
The Redirect URIs should be the two lines (Note: these lines will wrap around when you Copy & Paste them in to the textfield, as you can see in the screenshot below):
The fields Owner Email, Redirect URI (legacy) and Icon URL can be left empty.
When the Developer key has been created you copy the ID and Key and send them to email@example.com
When we receive the email we will notify you, and then set up the Key and ID in our database. Once that is completed we will notify you by email again, and at this point teachers connected to your institution in Peergrade will be able to import students from Canvas on the Participants-page in Peergrade.