I cannot connect CloudSQL with Cloud Run

When I tried to start n8n with CloudRun and CloudSQL, I could not run the container due to DB_MYSQLDB_HOST setting.

GCP shows DB_MYSQLDB_HOST should be “/cloudsql/PROJECT-ID:REGION:INSTANCE-ID” style.
But the n8n don’t allow none address style.
https://cloud.google.com/sql/docs/mysql/connect-run?hl=ja#console

I found following logs on the console.

(node:2) UnhandledPromiseRejectionWarning: Error: getaddrinfo ENOTFOUND XXXXXXXX

So I wish n8n is applied for CloudSQL.