Merge branch 'master' into user-sort

graph/resolvers/user.js

@@ -22,13 +22,6 @@ const User = {
     }
 
   },
-  created_at({roles, created_at}, _, {user}) {
-    if (user && user.can(SEARCH_OTHER_USERS)) {
-      return created_at;
-    }
-
-    return null;
-  },
   comments({id}, {query}, {loaders: {Comments}, user}) {
 
     // If the user is not an admin, only return comment list for the owner of

graph/typeDefs.graphql

@@ -79,7 +79,7 @@ type User {
   username: String!
 
   # creation date of user
-  created_at: String!
+  created_at: Date!
 
   # Action summaries against the user.
   action_summaries: [ActionSummary!]!