Security field validation: disclose missing field name

src/ApplicationComponent.ts

@@ -68,7 +68,7 @@ export default abstract class ApplicationComponent<T> {
 
     protected checkSecurityConfigField(field: string) {
         if (!config.has(field) || config.get<string>(field) === 'default') {
-            throw new SecurityError('field not configured.');
+            throw new SecurityError(`${field} field not configured.`);
         }
     }
 }