{"action":"closed","issue":{"url":"https://api.github.com/repos/new3Rs/current-visitors/issues/1","labels_url":"https://api.github.com/repos/new3Rs/current-visitors/issues/1/labels{/name}","comments_url":"https://api.github.com/repos/new3Rs/current-visitors/issues/1/comments","events_url":"https://api.github.com/repos/new3Rs/current-visitors/issues/1/events","html_url":"https://github.com/new3Rs/current-visitors/issues/1","id":66846808,"number":1,"title":"Execption using","user":{"login":"kahon","id":615981,"avatar_url":"https://avatars.githubusercontent.com/u/615981?v=3","gravatar_id":"","url":"https://api.github.com/users/kahon","html_url":"https://github.com/kahon","followers_url":"https://api.github.com/users/kahon/followers","following_url":"https://api.github.com/users/kahon/following{/other_user}","gists_url":"https://api.github.com/users/kahon/gists{/gist_id}","starred_url":"https://api.github.com/users/kahon/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kahon/subscriptions","organizations_url":"https://api.github.com/users/kahon/orgs","repos_url":"https://api.github.com/users/kahon/repos","events_url":"https://api.github.com/users/kahon/events{/privacy}","received_events_url":"https://api.github.com/users/kahon/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":4,"created_at":"2015-04-07T10:20:25Z","updated_at":"2015-04-07T13:57:05Z","closed_at":"2015-04-07T13:57:05Z","body":"Hi!\r\nI have tried to use the package but when currentVisitors is called I have got an exception on server side:\r\n`Exception while invoking method 'current-visitors' MongoError: '$unset' is empty. You must specify a field like so: {$mod: {<field>: ...}}`"}}