The secret is returned only once. Store it securely for
verifying X-Edpire-Signature headers on incoming deliveries.
API key starting with edp_live_. Pass via Authorization: Bearer edp_live_xxx.
Scopes: read:assessments, write:assessments, read:results, write:submissions.
HTTPS URL (http://localhost allowed for dev)
1submission.graded, assessment.published, assessment.archived, assessment.updated, collection.created, collection.updated, collection.deleted, collection.item_added, collection.item_removed, collection.reordered