Catch exception when querying sys.logins without permissions (#1984)

src/Microsoft.SqlTools.ServiceLayer/Utility/DatabaseUtils.cs

@@ -293,6 +293,8 @@ namespace Microsoft.SqlTools.ServiceLayer.Utility
         }
 
         public static string[] LoadItems(ServerConnection serverConnection, string urn)
+        {
+            try
             {
                 List<string> items = new List<string>();
                 Request req = new Request();
@@ -317,5 +319,14 @@ namespace Microsoft.SqlTools.ServiceLayer.Utility
                 items.Sort();
                 return items.ToArray();
             }
+            catch (Microsoft.SqlServer.Management.Sdk.Sfc.EnumeratorException)
+            {
+                // reading Logins can fail when trying to create a contained/SQL DB user
+                // when the current session does not have permissions to master
+                // we can return an empty existing login list in this scenario
+                // no need to log here since this is an expected non-blocking exception that is recoverable
+                return new string[0];
+            }
+        }
     }
 }