Hi. I'm new to GrowthBook and I have a question about its integration with Google BigQuery. I'm exporting data from GA4 to BigQuery, which I'm using to set up some metrics in GrowthBook. Many metric SQL examples that I've found online use tables starting with "ga_sessions", but these don't seem to be available, only tables starting with "events". Any ideas what's going on? My team's research hasn't turned up anything. I appreciate that this might be more of a GCS question than a GrowthBook question, but I'm interested to know if you have any ideas nonetheless.