Presently, it appears that we can only obtain a grant token by having a human interact with their browser i.e.

1. my service starts up without a grant token so it then displays a URL that a human can go to

2. the human goes the browser, consents to the data being shared and then submits

3. Zoho then sends the grant token to my services's redirect url

I would prefer to eliminate the human interaction as services and their hosts are often restarted. Is there a way to have my service directly obtain a grant token? In effect, the service itself would be logging in.