Why is Google Oauth returning `invalid redirect_urI` in my Rails app?

Question

I\'m adding Google Oauth2 to a Rails app, but have been unable to get past the early stages.

I\'ve set up an app, and defined client ID and secret.But I\'m getting <

Answer 1

For me it was the function that built up the google url. I put line breaks in the string, once I removed the line breaks the url worked again.