add channel permission manager

deployment/channel.py

@@ -0,0 +1,6 @@
+from django_eventstream.channelmanager import DefaultChannelManager
+
+
+class DeploymentChannelManager(DefaultChannelManager):
+    def can_read_channel(self, user, channel):
+        return user.is_authenticated

deployment/models.py

@@ -1,5 +1,4 @@
 from enum import Enum
-from uuid import uuid4
 
 
 from django.contrib.auth.models import User