Error with Express 4. and Google: redirect_uri is not provided
I see an error `Missing required parameter: redirect_uri` with Express 4 and google.

I have created a simple repro at https://runkit.com/vicb/grant

Click on the "endpoint". You should see the "connect" link.

When clicking on it, you should have the error.

![image](https://user-images.githubusercontent.com/248818/95399958-3cb16800-08be-11eb-8274-af7ef53848aa.png)
