@WTurner99 

It seems strange that Barnes and Noble would want an account in your system that they could log into. I don't use their service, but frequently this type of thing is done through an integration where you set them up with a developer API key. See the Integrations section of the Canvas Admin Guide for more information.

A long time ago, before Canvas had the developer API key offering for us, we would create an account for the vendor, generated a token, and then provided them with the token. They never logged into our system directly, but were able to use the API.