我的測試
如果出現
Account Already Created
The link you followed to this page has already been used to create your Gmail account. To access your account visit
http://gmail.google.com and log in with the username and password you chose during registration. To create another Gmail account, you'll need a shiny new account creation link. We apologize for the inconvenience.
應該是GMAIL所提供邀請函的鏈結網址未經GMAIL開放所致
（如果用之前已使用的邀請函自行修改鏈結位置就可能出現上列文字）
所以拿到邀請函的人
可能可以等個一兩天再鏈結進去試試
如果GMAIL本身發放邀請函系統程式的問題
應該GMAIL會解決