def _get_logins(self, environ, force_typecast=False):
u'''
Return the login counter from the query string in the ``environ``.
If it's not possible to convert it into an integer and
``force_typecast`` is ``True``, it will be set to zero (int(0)).
Otherwise, it will be ``None`` or an string.
'''
variables = Request(environ).queryvars
failed_logins = variables.get(self.login_counter_name)
if force_typecast:
try:
failed_logins = int(failed_logins)
except (ValueError, TypeError):
failed_logins = 0
return failed_logins
