The authorization_code which the app asked for. The application can use the authorization code to ask for an accessibility token to the goal resource. Authorization codes are small lived. Ordinarily, they expire after about 10 minutes. MissingCustomSigningKey - This application is needed to become configured with an app-precise signing key. https://angelotilkk.ageeksblog.com/31188778/the-2-minute-rule-for-tentenbet-domain