https://app.adalo.com/apps/
. For example, if the URL for your app is https://app.adalo.com/apps/b78bdfcf-48dc-4550-a474-dd52c19fc371/app-settings
, b78bdfcf-48dc-4550-a474-dd52c19fc371
is the App ID. Copy this value and enter it in your credential.