## Canvas Connect
### Updates & Improvements
- LTI launch now returns a hard `409 Conflict` when external identity
lookup is ambiguous (no email-only fallback).

## External Logins
### Updates & Improvements
- Add-users identity lookup now returns a hard `409 Conflict` when
ambiguous (no email-only fallback).

## Internal
### Updates & Improvements
- Added new CLI command to surface account identity collisions: `poetry
run python -m pingpong db find_external_login_conflicts`.