Adapting header to the new structure

Packages/ohif-user-management/client/lib/logout.js

@@ -0,0 +1,9 @@
+import { Meteor } from 'meteor/meteor';
+import { Router } from 'meteor/iron:router';
+import { OHIF } from 'meteor/ohif:core';
+
+OHIF.user.logout = () => {
+    Meteor.logout(function() {
+        Router.go('/entrySignIn');
+    });
+};