We use pdcleaner (https://developer.atlassian.com/cloud/jira/platform/rest/v3/api-group-jql/#api-rest-api-3-jql-pdcleaner-post) for changing userKey from input JQLs in our application. Apart from cleaning personal data this endpoint changes JQL syntactics. I would like to distinguish situation in which pdcleaner removed personal data from situation when only syntactics was changed. Therefore knowing AccountID regex would greatly help
An accountId uniquely identifies a user across all Atlassian products. It is 1-128 characters long and may contain alphanumeric characters as well as
You cannot assume anything else about their format as they have changed over time (e.g. some are only alphanumeric and some contain
Thank you @raimonds.simanovskis !