slack in backup-4.1.4

- old
+ new

@@ -4,14 +4,13 @@
   notify_by Slack do |slack|
     slack.on_success = true
     slack.on_warning = true
     slack.on_failure = true
 
-    # The team name
-    slack.team = 'my_team'
+    # The incoming webhook url
+    # https://hooks.slack.com/services/xxxxxxxx/xxxxxxxxx/xxxxxxxxxx
+    slack.webhook_url = 'xxxxxxxxxxxxxxxxxxxxxxxx'
 
-    # The integration token
-    slack.token = 'xxxxxxxxxxxxxxxxxxxxxxxx'
 
     ##
     # Optional
     #
     # The channel to which messages will be sent