Allow sending custom parameters in a token refresh

Add a new Stage to pass to the parameter modification call-back so
that the client code can recognize and adapt when preparing to
refresh an access token.

[ChangeLog][QAbstractAuth] Adds a token refresh stage
allowing parameters modification.

Task-number: QTBUG-59104
Change-Id: If6cd1349df163edd27ee083e82e6f537422574ca
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/oauth/qabstractoauth.h b/src/oauth/qabstractoauth.h
index a469e3b..c574875 100644
--- a/src/oauth/qabstractoauth.h
+++ b/src/oauth/qabstractoauth.h
@@ -80,7 +80,8 @@ public:
     enum class Stage {
         RequestingTemporaryCredentials,
         RequestingAuthorization,
-        RequestingAccessToken
+        RequestingAccessToken,
+        RefreshingAccessToken
     };
 
     enum class Error {