google api - send emails from MY gmail account with OAuth2 and nodemailer

Question

I want to send emails from my gmail address through my own server. I'm using nodemailer and using account credentials is flaky, and often times doesn't work and leads to this thread

I've implemented everything on that thread many times, and still it's flaky, and also I know OAuth2 is the way to go.

I have a project with cliendID and clientSecret in google developer console, as you can see:

But how do I get an access token WITHOUT any browser interaction?

I seem to be missing something trivial here ...

I've went through all google tutorials and docs I could find about OAuth2, tokens, and APIs, but all guides go through the browser in one point.

Answer 1

Go to the OAuth Playground, click the cog on the top right, check the Use your own OAuth credentials and insert your clientID and clientSecret.

Then select the Gmail API v1 scopes you want in the list to the left and follow the outlined steps and you will get an access_token and a refresh_token.