def __init__(self, request=None, *args, **kwargs):
        self.request = request
        self.user_cache = None
        super(AuthenticationForm, self).__init__(*args, **kwargs)
Generates the request log id for the current request.
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.4/django/contrib/auth/forms.py/AuthenticationForm.__init__--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/tools/dev_appserver.py/_GenerateRequestLogId