Please don't reveal this to your colleagues yet — everyone gets their own test and keeping it quiet is what makes the exercise work. Thanks for playing along.
You can ask Julien on Slack to confirm this really was a test.
Good news: nothing was captured from you — no password, no personal data.
If you're unsure whether a message is genuine, the right reflexes are to ask a colleague first, and then report it (Gmail → "Report phishing"). Neither is cheating — it's exactly what we want.