Add AllowedAuthMethods to appsettings.Staging.json

Author: aeshub

api/appsettings.Staging.json

@@ -2,6 +2,7 @@
   "AzureAd": {
     "ClientId": "47a40d36-25a0-434c-8de2-94f703fb57f4",
     "ClientSecret": "Fill in ASP.NET Secret Manager"
+    "AllowedAuthMethods": [ "WorkloadIdentity", "ClientSecret" ]
   },
   "Logging": {
     "LogLevel": {