Added createTime to join options (#3818)

* Added createTime to join options

* small fix

app/services/big_blue_button_api.rb

@@ -24,7 +24,15 @@ class BigBlueButtonApi
   end
 
   def join_meeting(room:, name:, role:)
-    bbb_server.join_meeting_url room.meeting_id, name, '', { role: }
+    bbb_server.join_meeting_url(
+      room.meeting_id,
+      name,
+      '', # empty password -> use the role passed ing
+      {
+        role:,
+        createTime: room.last_session&.to_datetime&.strftime('%Q')
+      }.compact
+    )
   end
 
   def meeting_running?(room:)