TF-2384 Handle refresh token when token expired in NSE

Signed-off-by: dab246 <tdvu@linagora.com>
(cherry picked from commit c8a39bb42792770c001ac90d6301d53126225d95)

ios/TwakeCore/Extensions/DateExtensions.swift

@@ -0,0 +1,7 @@
+import Foundation
+
+extension Date {
+    func isBefore(_ otherDate: Date) -> Bool {
+        return self < otherDate
+    }
+}