Merged in feature/refresh-token (pull request #401)

feat: SW-101 Proactively refresh tokens

Approved-by: Michael Zetterberg

constants/auth.ts

@@ -0,0 +1,12 @@
+/**
+ * How many seconds before the expiry of the access token
+ * the client should refresh the tokens
+ */
+export const PRE_REFRESH_TIME_IN_SECONDS = 30
+
+/**
+ * How many minutes the client should be allowed to be inactive
+ * and still get the tokens refreshed. The inactivity control
+ * gets reset when the URL changes.
+ */
+export const MAX_KEEP_ALIVE_TIME_IN_MINUTES = 2 * 60