Check if connected to GCP CloudSQL Postgres instance from App Deployed on kubernetes engine

I created a private CloudSQL instance for a postgres db. I followed the documentation at https://cloud.google.com/sql/docs/postgres/connect-kubernetes-engine and applied the yaml changes and restarted the deployment. Added the below to my existing Yaml for deployment. I was wondering if there is any way to test/check if the connection to the DB was successful. EDIT - I didnt encounter any errors when the pod restarted, so thats the main reason I am asking this question.

spec:
      containers:
      - name: <YOUR-APPLICATION-NAME>
        # ... other container configuration
        env:
        - name: DB_USER
          valueFrom:
            secretKeyRef:
              name: <YOUR-DB-SECRET>
              key: username
        - name: DB_PASS
          valueFrom:
            secretKeyRef:
              name: <YOUR-DB-SECRET>
              key: password
        - name: DB_NAME
          valueFrom:
            secretKeyRef:
              name: <YOUR-DB-SECRET>
              key: database
        - name: DB_HOST
          valueFrom:
            secretKeyRef:
              name: <YOUR-PRIVATE-IP-SECRET>
              key: db_host