When you are added to multiple Teams on Frame.io, you will have the option to view each team's account information under your Dashboard.
To access the Frame.io Dashboard, click the Frame.io logo on the top left corner and select Account Settings.
Once your Dashboard opens, you'll see the option to Manage account owned by. This is where you can switch between the accounts you are added to.
Clicking on Manage account owned by will reveal a drop-down list of any accounts added to either as a Team Member or as an Admin.