How to generate access token using refresh token through google drive API?

Question

I have completed steps of authorization and obtained access token and refresh token.

What should I do next to generate access token using refresh token that I have s

Answer 1

If you want to implement that yourself, the OAuth 2.0 flow for Web Server Applications is documented at https://developers.google.com/accounts/docs/OAuth2WebServer, in particular you should check the section about using a refresh token:

https://developers.google.com/accounts/docs/OAuth2WebServer#refresh