Refresh Access Token

[wonder0]

Hey, Thanks for such a detailed DiaglogFlowV2 pipeline. Earlier I was using V1 and it involved a very simple authentication process. But with V2 the authentication has become crazy difficult. Moreover, the Access Token generated gets expired in one hour. I tried searching for this but didn't find a solution. I can see people have solved it here, but I am not sure how to integrate same here. Please Help!