OAuth Generation without web login

We are working through API documentation available in:

https://www.adobe.io/apis/documentcloud/sign/docs.html#!adobedocs/adobe-sign/master/gstarted/get_acc...

https://secure.na4.echosign.com/public/static/oauthDoc.jsp

The OAuth authorization is a bit cumbersome.

It seems that the “Authorization Request” has to be initiated via a browser. That would require login to the Adobe sign to authorize access. Which then generates the code needed for the token service.

https://api.adobesign.com/oauth/token

Our solution would like to invoke APIs without the process via browser and that requires login to the Adobe sign. Is there a way to acquire that code programatically. That can be send to the token service without the browser interaction and approval process. Which typically invloves build url and the code from the redirect.

https://secure.na4.echosign.com/public/oauth/v2?redirect_uri=https://example.com/oauthDemo&
response_type=code&client_id=d4HQNPFIXFD255H&scope=user_login:self+agreement_write:account&
state=S6YQD7KDA556DIV6NAU4ELTGSIV26ZNMXDSF7WIEEP0ZLQCLDQ89OYG78C3K9SROC8DXCGRVSGKU1IT1

Any help is appreciated?