Google OAuth：未配置访问

Question

我正在尝试为我的应用程序设置Google OAuth身份验证。我已创建Google API项目并设置重定向URI。当我使用链接进行身份验证时，我得到响应：

{"errors"=>[{"domain"=>"usageLimits", "reason"=>"accessNotConfigured", "message"=>"Access Not Configured. Please use Google Developers Console to activate the API for your project."}], "code"=>403, "message"=>"Access Not Configured. Please use Google Developers Console to activate the API for your project."}: 
{
 "error": {
  "errors": [
   {
    "domain": "usageLimits",
    "reason": "accessNotConfigured",
    "message": "Access Not Configured. Please use Google Developers Console to activate the API for your project."
   }
  ],
  "code": 403,
  "message": "Access Not Configured. Please use Google Developers Console to activate the API for your project."
 }
}

.

我明白我应该从我的Google开发人员控制台激活一些API。问题是我不明确地了解我应该从87项列表中激活哪些API：

Answer 1

现场身份验证的必要API是Google+，因为我理解