diff --git a/ManagerService/Controllers/InstanceController.cs b/ManagerService/Controllers/InstanceController.cs
index 6b5fd4e..6b0573e 100644
--- a/ManagerService/Controllers/InstanceController.cs
+++ b/ManagerService/Controllers/InstanceController.cs
@@ -184,6 +184,10 @@ namespace ManagerService.Controllers
 
                 return new OkObjectResult(instance.ToDTO());
             }
+            catch (KeyNotFoundException ex)
+            {
+                return new NotFoundObjectResult(ex.Message) { };
+            }
             catch (Exception ex)
             {
                 return new ObjectResult(ex.Message) { StatusCode = 500 };
diff --git a/ManagerService/appsettings.json b/ManagerService/appsettings.json
index 1850392..91cd218 100644
--- a/ManagerService/appsettings.json
+++ b/ManagerService/appsettings.json
@@ -32,8 +32,8 @@
   },
   "ClientSettings": {
     "Id": "ManagerService",
-    "UserName": "admin",
-    "Password": "mdlf2021!"
+    "UserName": "user1", //admin
+    "Password": "MyMuseum2023!" //mdlf2021!
   },
   "SupportedLanguages": [ "FR", "NL", "EN", "DE", "IT", "ES", "PL", "CN", "AR", "UK" ]
   //"Urls": "http://[::]:80"