A recent and "widespread" API outage had left Discord unusable for some people for part of the day. After reports of the problem started to surface online, Discord began investigating at approximately 2:49PM ET. Minutes later, it said it had identified the underlying issue causing the outage, but noted it was also dealing with a secondary problem related to one of its database clusters. "We have our entire on-call response team online and responding to the issue," the company said at the time.
At 3:07PM ET, the company implemented a login limit to manage its traffic load, a measure it's now slowly easing as things return to normal. If you can't access your Discord account yet, wait a bit and try again in the next 30 minutes to an hour.
Update 6:32PM ET: Discord says most users should now be able to log in and use the service again. "Over the next hour, some Discord servers may continue to see some issues interacting with bots using slash commands," the company said. "As part of resolving the incident, we needed to reduce load on our databases and we turned down some parts of our slash command system." Discord promised to share a postmortem once it had more information about what happened.