Exporting Mixpanel Data to Snowflake: GCS Bucket Ownership Clarified

I'm looking to export all our mixpanel data to snowflake, and looking at this great guide here. It mentions: you need you create a gcs storage integration with gcs bucket "gcs://mixpanel-export-pipelines-<project-id> owned by Mixpanel Does this mean a gcs bucket already exists for our account and is owned by mixpanel? or do we need to create our own? ty!