creates channels attributes based on products attribute in case channels are not provided in order to start connection (danpaquin#393)

Co-authored-by: Adriel Vieira <[email protected]>

Author: adrielvieira

cbpro/websocket_client.py

@@ -70,7 +70,8 @@ def _connect(self):
             self.url = self.url[:-1]
 
         if self.channels is None:
-            sub_params = {'type': 'subscribe', 'product_ids': self.products}
+            self.channels = [{"name": "ticker", "product_ids": [product_id for product_id in self.products]}]
+            sub_params = {'type': 'subscribe', 'product_ids': self.products, 'channels': self.channels}
         else:
             sub_params = {'type': 'subscribe', 'product_ids': self.products, 'channels': self.channels}