PI-485 give the proper 404 response when a user requests /stacks/<id>/ that exists but they don't have permission to see
PI-485 give the proper 404 response when a user requests /stacks/<id>/ that exists but they don't have permission to see

clarkperkins/stackdio,clarkperkins/stackdio,stackdio/stackdio,stackdio/stackdio,clarkperkins/stackdio,stackdio/stackdio,stackdio/stackdio,clarkperkins/stackdio