Cannot find Account Teams in a Sales Account

I am currently trying to complete this challenge: https://trailhead.salesforce.com/content/learn/projects/protect-your-data-in-salesforce/set-up-account-teams?trail_id=learn-admin-essentials on the last step, it wants me to Add the default team to one of your accounts but I can't find 'Account Team' related list. Is there something I'm missing?