Opsgenie change history: Atlassian Account login issues

Opsgenie reported a major Atlassian Account login and signup outage affecting some Cloud customers, including EU and US authentication components. The incident started at 2023-09-13 14:08 UTC and was resolved at 2023-09-13 19:32 UTC (5 h 23 min). The postmortem attributed sign-in and signup API failures to misconfigured internal rate limits; mitigation restored service.