Creating google Oauth process step by step

 

Step1: Create account in https://console.cloud.google.com/

Step2: Create a new project for your project

Step3: Goto API & Services and then click on Credentials, You can check below image

Step4: Click to create Credentials and create Oauth client ID

After all done 

And once follow same process 

select web application

finally you can see it Client-ID and Client-secret