diff --git a/lib/process-services-cloud/src/lib/app/models/application-instance.model.ts b/lib/process-services-cloud/src/lib/app/models/application-instance.model.ts
index 073be37c5d..4d91f62454 100644
--- a/lib/process-services-cloud/src/lib/app/models/application-instance.model.ts
+++ b/lib/process-services-cloud/src/lib/app/models/application-instance.model.ts
@@ -45,6 +45,12 @@ export interface Descriptor {
     version?: string;
     runtimeBundleVersion?: string;
     enableLocalDevelopment?: boolean;
+    customUIAuthFlowType?: DescriptorCustomUIAuthFlowType;
+}
+
+export enum DescriptorCustomUIAuthFlowType {
+    CODE = 'CODE',
+    IMPLICIT = 'IMPLICIT'
 }
 
 export interface DescriptorSecurity {