Update user email not working

I am using raven client with my Django application, and I did:

from raven.contrib.django.raven_compat.models import client as django_raven_client

django_raven_client.user_context({‘email’: ‘foo@example.com’}) in view function,

but user email doesn’t change on the error report in Sentry interface. I reckon I probably did something wrong. Any thoughts would be appreciated!