Sharing task discussions when sharing project widgets

I have shared a parent project using the Share Read-Only widget feature.  I used the below settings.  I shared the link with external unlicensed users.   I want the user to be able to see all tasks, sub projects, milestones etc and also be able to click on any of the tasks and see the discussions as read-only.  But the user is being asked for login details each time. I don't really want to give the user an account.  Is there any other way of achieving this? 

Thanks

Ian