{"action":"opened","issue":{"url":"https://api.github.com/repos/telegramdesktop/tdesktop/issues/569","labels_url":"https://api.github.com/repos/telegramdesktop/tdesktop/issues/569/labels{/name}","comments_url":"https://api.github.com/repos/telegramdesktop/tdesktop/issues/569/comments","events_url":"https://api.github.com/repos/telegramdesktop/tdesktop/issues/569/events","html_url":"https://github.com/telegramdesktop/tdesktop/issues/569","id":62101540,"number":569,"title":"[Bug] Invalid username if starts or ends with underscore symbol","user":{"login":"ezdev128","id":10166012,"avatar_url":"https://avatars.githubusercontent.com/u/10166012?v=3","gravatar_id":"","url":"https://api.github.com/users/ezdev128","html_url":"https://github.com/ezdev128","followers_url":"https://api.github.com/users/ezdev128/followers","following_url":"https://api.github.com/users/ezdev128/following{/other_user}","gists_url":"https://api.github.com/users/ezdev128/gists{/gist_id}","starred_url":"https://api.github.com/users/ezdev128/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ezdev128/subscriptions","organizations_url":"https://api.github.com/users/ezdev128/orgs","repos_url":"https://api.github.com/users/ezdev128/repos","events_url":"https://api.github.com/users/ezdev128/events{/privacy}","received_events_url":"https://api.github.com/users/ezdev128/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-03-16T14:43:29Z","updated_at":"2015-03-16T14:43:29Z","closed_at":null,"body":"I just found that the usernames like @abcde_ or @_abcde are invalid. Why?\r\n"}}