def authenticate_credentials(payload, request):
user_id = payload.get('user_id', '')
role = payload.get('role', '')
if '' in (user_id, role):
msg = _('Invalid payload.')
raise exceptions.AuthenticationFailed(msg)
if role == 'commerce':
v = cache.hget('user:user', user_id)
try:
obj = json.loads(v)
user = User.init_from_dict(obj)
except json.JSONDecodeError:
return None
elif role == 'proxy':
try:
user = Proxy.objects.get(id=user_id)
except Proxy.DoesNotExist:
return None
else:
try:
user = Channel.objects.get(id=user_id)
except Channel.DoesNotExist:
return None
return user
