Revert use to standardized LTI field instead of Moodle specific field for the username

Steps to reproduce

Introduced by MH-12840:

The Moodle-only field `ext_user_username` is used to extract the the username form the LTI authentication request instead of the optional standardized field `lis_person_sourcedid`.

Status

Assignee

Matthias Neugebauer

Reporter

Matthias Neugebauer

Severity

Incorrectly Functioning Without Workaround

Tags (folksonomy)

None

Components

Backend Software

Third Party Software

Fix versions

4.5

5.2

3.7

Affects versions

5.0

4.4

3.6

Priority

Major