Add region in params

Author: esrakartalOpt

optimizely/event_builder.py

@@ -269,6 +269,8 @@ def create_impression_event(
 
         params[self.EventParams.USERS][0][self.EventParams.SNAPSHOTS].append(impression_params)
 
+        params['region'] = str(project_config.region)
+
         region = project_config.region or 'US'
         events_url = self.EVENTS_URLS.get(region, self.EVENTS_URLS['US'])
 
@@ -296,6 +298,8 @@ def create_conversion_event(
 
         params[self.EventParams.USERS][0][self.EventParams.SNAPSHOTS].append(conversion_params)
 
+        params['region'] = str(project_config.region)
+
         region = project_config.region or 'US'
         events_url = self.EVENTS_URLS.get(region, self.EVENTS_URLS['US'])