title: Connect Google Cloud SQL with Serverless VPC access issue
body: <p>I have Google App Engine project and when I try to connect to Google Cloud SQL through Serverless VPC access I got such error</p>
  <pre><code>ConnectionError: Failed to connect to 11.11.111.1:1433 - unable to verify the first certificate
  </code></pre>
  <p>If you have any suggestion that would be great</p>
  <p>Here is the code:</p>
  <pre><code>const createPool = async () =&gt; {
    const config = {pool: {}};
    config.user = process.env.DB_USER; // e.g. 'my-db-user'
    config.password = process.env.DB_PASS; // e.g. 'my-db-password'
    config.database = process.env.DB_NAME; // e.g. 'my-database'
    config.server = process.env.DB_PUBLIC_IP;
    config.port = 1433;
  
    config.connectionTimeout = 60000;
    config.pool.acquireTimeoutMillis = 30000;
    config.pool.min = 1;
    config.pool.createRetryIntervalMillis = 200;
  
    return await mssql.connect(config);
  };
  </code></pre>