fix(aud): Update set_current_user proxy fn to pass in expected aud

* based on flask.current_app.config
* Since this already assumes Flask request ctx, I think OK to look in Flask app cfg in this case

src/authutils/user.py

@@ -11,7 +11,12 @@
 
 
 def set_current_user(**kwargs):
-    flask.g.user = CurrentUser(**kwargs)
+    expected_audience = flask.current_app.config.get("USER_API")
+    # Gen3 services use both USER_API and BASE_URL
+    if not expected_audience:
+        expected_audience = flask.current_app.config.get("BASE_URL")
+
+    flask.g.user = CurrentUser(jwt_kwargs={"audience": expected_audience}, **kwargs)
     set_current_token(flask.g.user._claims)
     return flask.g.user