After doing everything from here http://code.google.com/appengine/docs/python/tools/appstats.html I get
<class 'google.appengine.api.users.NotAllowedError'>:
Traceback (most recent call last):
File "/base/python_runtime/python_lib/versions/1/google/appengine/ext/appstats/ui.py", line 324, in <module>
main()
File "/base/python_runtime/python_lib/versions/1/google/appengine/ext/appstats/ui.py", line 320, in main
util.run_bare_wsgi_app(app)
File "/base/python_runtime/python_lib/versions/1/google/appengine/ext/webapp/util.py", line 116, in run_bare_wsgi_app
result = application(env, _start_response)
File "/base/python_runtime/python_lib/versions/1/google/appengine/ext/appstats/ui.py", line 308, in __call__
users.create_login_url(os.getenv('PATH_INFO', '')))])
File "/base/python_runtime/python_lib/versions/1/google/appengine/api/users.py", line 256, in create_login_url
raise NotAllowedError
when trying to access myapp.appspot.com/_ah/stats or just myapp.appspot.com/stats/