{"action":"created","issue":{"url":"https://api.github.com/repos/eriko/discourse_cas_sso/issues/2","labels_url":"https://api.github.com/repos/eriko/discourse_cas_sso/issues/2/labels{/name}","comments_url":"https://api.github.com/repos/eriko/discourse_cas_sso/issues/2/comments","events_url":"https://api.github.com/repos/eriko/discourse_cas_sso/issues/2/events","html_url":"https://github.com/eriko/discourse_cas_sso/issues/2","id":89786251,"number":2,"title":"where should I provide the callback URL?","user":{"login":"ikbear","id":232018,"avatar_url":"https://avatars.githubusercontent.com/u/232018?v=3","gravatar_id":"","url":"https://api.github.com/users/ikbear","html_url":"https://github.com/ikbear","followers_url":"https://api.github.com/users/ikbear/followers","following_url":"https://api.github.com/users/ikbear/following{/other_user}","gists_url":"https://api.github.com/users/ikbear/gists{/gist_id}","starred_url":"https://api.github.com/users/ikbear/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ikbear/subscriptions","organizations_url":"https://api.github.com/users/ikbear/orgs","repos_url":"https://api.github.com/users/ikbear/repos","events_url":"https://api.github.com/users/ikbear/events{/privacy}","received_events_url":"https://api.github.com/users/ikbear/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":12,"created_at":"2015-06-20T16:01:22Z","updated_at":"2015-06-21T04:14:24Z","closed_at":null,"body":"Hi, I got this problem while running this app as a proxy:\r\n\r\n```\r\nno implicit conversion of nil into String\r\n```\r\n\r\nI don't know where should i provide the callback Url, could you provide a detailed readme.md? Thanks."},"comment":{"url":"https://api.github.com/repos/eriko/discourse_cas_sso/issues/comments/113862703","html_url":"https://github.com/eriko/discourse_cas_sso/issues/2#issuecomment-113862703","issue_url":"https://api.github.com/repos/eriko/discourse_cas_sso/issues/2","id":113862703,"user":{"login":"ikbear","id":232018,"avatar_url":"https://avatars.githubusercontent.com/u/232018?v=3","gravatar_id":"","url":"https://api.github.com/users/ikbear","html_url":"https://github.com/ikbear","followers_url":"https://api.github.com/users/ikbear/followers","following_url":"https://api.github.com/users/ikbear/following{/other_user}","gists_url":"https://api.github.com/users/ikbear/gists{/gist_id}","starred_url":"https://api.github.com/users/ikbear/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ikbear/subscriptions","organizations_url":"https://api.github.com/users/ikbear/orgs","repos_url":"https://api.github.com/users/ikbear/repos","events_url":"https://api.github.com/users/ikbear/events{/privacy}","received_events_url":"https://api.github.com/users/ikbear/received_events","type":"User","site_admin":false},"created_at":"2015-06-21T04:14:24Z","updated_at":"2015-06-21T04:14:24Z","body":"I changed my hostname in discourse_default.conf:\r\n\r\n![hostname](https://cloud.githubusercontent.com/assets/232018/8270346/ff8b8eec-180e-11e5-8eb1-2115720e69a3.png)\r\n\r\nBut the result is the same:\r\n\r\n![sso-return-url](https://cloud.githubusercontent.com/assets/232018/8270347/07d3957c-180f-11e5-85b8-2262a6b2a2ad.png)"}}