Open Channels, choose a channel, then Disconnect. By default the channel is disabled and its history is kept so past reports still work. Choose “Purge history” to delete every stored metric for that channel.
Disconnecting also asks Google to revoke the stored credentials. You can confirm or revoke access yourself at myaccount.google.com/permissions.
Settings → Data retention → Delete workspace removes all channels, credentials, metrics, exports and audit records. This cannot be undone.
If you cannot sign in, email the workspace owner’s support address with the channel ID you want removed. We action verified requests within 30 days.