The trick is to input the right redirect url at the point of creating the ID. I found that updating the redirect url once the ID has been created via an 'Edit' just doesn't get the job done. What also worked for me is duplicating the entire 'vendor' folder and copying it to the same location where the 'oauth' file is (just until you successfully generate the token and then you can delete the duplicate 'vendor' folder). This is because trying to point to the vendor folder via '../vendor/autoload' didn't work for me.

因此，删除您现有的麻烦客户端OAuth ID，并尝试这种方法，它将工作。

在我的例子中，我的证书应用类型是“其他”。所以我无法在凭证页中找到授权重定向uri。它似乎出现在应用程序类型:“Web应用程序”。但是您可以单击Download JSON按钮来获取client_secret。json文件。

打开json文件，你可以找到这样的参数:"redirect_uri ":["urn:ietf:wg:oauth:2.0:oob"，"http://localhost"]。我选择使用http://localhost，它很适合我。

如果你使用谷歌+ javascript按钮，那么你必须使用postmessage而不是实际的URI。我花了几乎一整天的时间才弄清楚，因为谷歌的文档出于某种原因没有清楚地说明它。

对我来说，这是因为在“授权重定向uri”列表中，我错误地把https://developers.google.com/oauthplayground/而不是https://developers.google.com/oauthplayground(没有/在最后)。

我的观点是: 如果使用Google_Client库，不要忘记在更新重定向URI之后更新服务器上的JSON文件。

The trick is to input the right redirect url at the point of creating the ID. I found that updating the redirect url once the ID has been created via an 'Edit' just doesn't get the job done. What also worked for me is duplicating the entire 'vendor' folder and copying it to the same location where the 'oauth' file is (just until you successfully generate the token and then you can delete the duplicate 'vendor' folder). This is because trying to point to the vendor folder via '../vendor/autoload' didn't work for me.

因此，删除您现有的麻烦客户端OAuth ID，并尝试这种方法，它将工作。