18734cf0a1
This change adds a Django authentication backend which, when installed will authenticate users based on their LTI identity rather than using a username/password combination. The authentication method determines first whether a user with the given username exists and, if so, whether that user is associated with an LTI identity. It also verifies that the LTI consumer and user ID passed to the LTI launch match those stored in the LtiUser table. This will always be the case if the authentication backend is reached through the LTI code, but it provides an extra guarantee if the backend is called from elsewhere.
LMS (Learning Management System) -------------------------------- This directory contains code relating to the student portal for edX.