Rename env var (#169)

* Rename env var

* Add NEWS bullet

Author: jennybc

NEWS.md

@@ -1,5 +1,7 @@
 # httr2 (development version)
 
+* The environment variable `HTTR2_REFRESH_TOKEN` replaces the previous `HTTR_REFRESH_TOKEN` (@jennybc, #169).
+
 * OAuth tokens can now be refreshed. One, two, or even more times! (@jennybc, #166)
 
 * Can now print responses where content type is the empty string (@mgirlich, #163).

R/oauth-flow-refresh.R

@@ -23,7 +23,7 @@
 #' req <- request("https://example.com")
 #' req %>% req_oauth_refresh(client)
 req_oauth_refresh <- function(req, client,
-                              refresh_token = Sys.getenv("HTTR_REFRESH_TOKEN"),
+                              refresh_token = Sys.getenv("HTTR2_REFRESH_TOKEN"),
                               scope = NULL,
                               token_params = list()) {
 
@@ -51,13 +51,13 @@ req_oauth_refresh <- function(req, client,
 #' @param refresh_token A refresh token. This is equivalent to a password
 #'   so shouldn't be typed into the console or stored in a script. Instead,
 #'   we recommend placing in an environment variable; the default behaviour
-#'   is to look in `HTTR_REFRESH_TOKEN`.
+#'   is to look in `HTTR2_REFRESH_TOKEN`.
 #' @family OAuth flows
 #' @returns An [oauth_token].
 #' @export
 #' @keywords internal
 oauth_flow_refresh <- function(client,
-                               refresh_token = Sys.getenv("HTTR_REFRESH_TOKEN"),
+                               refresh_token = Sys.getenv("HTTR2_REFRESH_TOKEN"),
                                scope = NULL,
                                token_params = list()) {
   oauth_flow_check("refresh", client)