While setting up metastore in GCP Databricks, I added the bucket name and then  service account permissons as well. Still my catalog dont have base root location. This deters me from creating table in my catalog. 

Root storage credential for metastore XXXXXX does not exist. Please contact your Databricks representative or consider updating the metastore with a valid storage credential https://docs.databricks.com/api- explorer/workspace/metastores/update

I followed this documentation, this root storage credential thing is nowhere mentioned in the documentation
https://docs.gcp.databricks.com/en/data-governance/unity-catalog/enable-workspaces.html#enable-works...