#' GitHub User
#'
#' Look up email address of GitHub user.
#'
#' @param user GitHub username.
#'
#' @return Vector of strings containing \code{@} sign.
#'
#' @export
github <- function(user)
{
url <- paste0("https://api.github.com/users/", user, "/events/public")
x <- suppressWarnings(readLines(url))
x <- unlist(strsplit(x, "\""))
x <- grep("@", x, value=TRUE)
x
}
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