Here you have an overview of your apps and their connection status:
If you haven't yet connected any app store account, you can easily do so by clicking on "Add new Credential":
Disconnecting your app store accounts
If you want to disconnect your App Store Connect or Google Play Developer Account go to the Google Console (under Users and permissions) and/or to App Store Connect (under Users and Access), find the specific email you invited in the first place e.g. purple@appradar.com, and remove the user from the account.