Account Session 

An AccountSession allows a Connect platform to grant access to a connected account in Connect embedded components.

We recommend that you create an AccountSession each time you need to display an embedded component to your user. Do not save AccountSessions to your database as they expire relatively quickly, and cannot be used more than once.

Related guide: Connect embedded components

Application Fees 

When you collect a transaction fee on top of a charge made for your user (using Connect), an Application Fee object is created in your account. You can list, retrieve, and refund application fees.

Related guide: Collecting application fees