Go to the login page and click Forgot password. Enter your email address and you'll receive a reset link within 1 minute (valid for 1 hour).
Didn't receive the email? Check:
1. Spam / junk folder
2. Correct email address entered (the address you log in with, not your work or personal alias)
3. Wait 2-3 minutes — sometimes email delivery takes a bit longer
Still nothing? Ask a fellow admin to set a new password for you via Admin → Users.