#' @param key A character string specifying a Dataverse server API key. If one
#' is not specified, functions calling authenticated API endpoints will fail.
#' Keys can be specified atomically or globally using
#' \code{Sys.setenv("DATAVERSE_KEY" = "examplekey")}.
#' @param server A character string specifying a Dataverse server.
#' Multiple Dataverse installations exist, with `"dataverse.harvard.edu"` being the
#' most major. The server can be defined each time within a function, or it can
#' be set as a default via an environment variable. To set a default, run
#' `Sys.setenv("DATAVERSE_SERVER" = "dataverse.harvard.edu")`
#' or add `DATAVERSE_SERVER = "dataverse.harvard.edu` in one's `.Renviron`
#' file (`usethis::edit_r_environ()`), with the appropriate domain as its value.
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