Dedupe direct/child roles in Auth pipline

Author: TylerBrock

src/Auth.js

@@ -257,9 +257,15 @@ Auth.prototype._generateRoleGraphPipeline = function () {
               },
             },
           },
+          {
+            $group: {
+              _id: { name: '$name' },
+            },
+          },
           {
             $project: {
-              name: 1,
+              _id: 0,
+              name: '$_id.name',
             },
           },
         ],
@@ -284,9 +290,15 @@ Auth.prototype._generateRoleGraphPipeline = function () {
               },
             },
           },
+          {
+            $group: {
+              _id: { name: '$name' },
+            },
+          },
           {
             $project: {
-              name: 1,
+              _id: 0,
+              name: '$_id.name',
             },
           },
         ],