Cannot resolve symbol default_web_client_id in Firebase's Android Codelab

Question

I am trying to learn Firebase, so I went through the Android Codelab. The project they gave me however, had an error:

Cannot resolve symbol default_web_cl

Answer 1

Download again google-services.json file from the firebase project that you connected with your android project and replace it in app/src directory. And then select clean project option which is in build sub menu. This worked for me.