gcloud create oauth token

visit https://console.cloud.google.com/apis/dashboard for your project

            

            
click 

credentials -> create credentials -> oauth client id

            

            
select web app and give the client a name

            

            
enter authorised domains, this is where web request will come from
 to use oath playground add also
 
 https://oauth-redirect.googleusercontent.com
 
 and also origins such as a development origin
 
 http://localhost:3000
 
            

            
under Authorized redirect URIs

redirect uri's are sometimes used when granting access, the user will be sent to a google 
consent page, when they consent they'll be redirected back here with the token in the 
page search parameters

  add 

https://oauth-redirect.googleusercontent.com/r/oauth2playground

  to use the oauthplayground
  
            

save the credentials, you'll need

  client_id
  
  client_secret