Go to "Settings" page in Canvas
When requesting the key and secret from Macmillan, it does not matter if the Canvas admin is using a course, an admin account, or a sub-account. Proceed to the Settings page in Canvas.
Click the "Apps" tab
Select "Macmillan Higher Education"
Scroll down the External Apps (Apps Center) page or use the Filter by name box to find the Macmillan Higher Education app and click it.
On the Macmillan app page click the here link to begin the registration with Macmillan and request the key and secret.
Fill out "Request New Key and Secret" form
You will receive a confirmation that your key and secret request was sent. Simply close the window and return to Canvas.