For some anecdata on illegal behavior, Atlassian denied my data deletion request on the basis that they're legally allowed to choose to use logins as a proof of

For some anecdata on illegal behavior, Atlassian denied my data deletion request on the basis that they're legally allowed to choose to use logins as a proof of identity (since without some kind of proof anyone could prank delete anyone else's data) and since they'd given away my account the day before I thus couldn't login to prove that it was my data, despite having otherwise valid credentials and whatever other proof of identity they might need.