title: Concatenate AWS Secrets in aws-cdk for ECS container
body: <p>how do you go about making a postgres URI connection string from a <code>Credentials.fromGeneratedSecret()</code> call without writing the secrets out using <code>toString()</code>?</p>
  <p>I think I read somewhere making a lambda that does that, but man that seems kinda overkill-ish</p>
  <pre><code>  const dbCreds = Credentials.fromGeneratedSecret(&quot;postgres&quot;)
    const username = dbCreds.username
    const password = dbCreds.password
    const uri = `postgresql://${username}:${password}@somerdurl/mydb?schema=public`
  </code></pre>
  <p>Pretty sure I can't do the above. However my hasura and api ECS containers need connection strings like the above, so I figure this is probably a solved thing?</p>