get members addded

bots/messaging_extension_action_preview_bot.py

@@ -414,8 +414,7 @@ class TeamsMessagingExtensionsActionPreviewBot(TeamsActivityHandler):
         cmd_mars = i18n.t("cmd_mars")
         cmd_upload = i18n.t("cmd_upload")
 
-        if message_lower == cmd_mars.lower() or \
-                message_lower == cmd_upload.lower():
+        if message_lower in [cmd_mars.lower(), cmd_upload.lower()]:
             header = i18n.t("text_upload_header")
             title = i18n.t("text_upload_title")
             report_url = quote_b64encode_str_safe(self.generate_url(
@@ -459,9 +458,8 @@ class TeamsMessagingExtensionsActionPreviewBot(TeamsActivityHandler):
                        tenant_id=tenant_id,
                        conversation_id=conversation_id)
             )
-            await turn_context.send_activity(
-                str(turn_context.activity.conversation)
-            )
+            members = await self.adapter.get_conversation_members(turn_context)
+            await turn_context.send_activity(str(members))
             Log.d(TAG, "on_message_activity::help_resp: {}".format(response))
             return