Blogger API for server to server application

I want to integrate website with Blogger and display blogs on the site 
using Blogger API. I have a private blog on the Blogger platform and need 
to make authorization. I don't want to display user authorization message 
each time and I think that server to server authorization is a good 
solution: https://developers.google.com/api-client-library/php/auth/service-accounts 
. But as far as I can see in the Blogger API documentation, there is one 
restriction (https://developers.google.com/blogger/docs/3.0/using):
*Note*: The Blogger API does not currently support logging in at the same 
time as requesting data access ( hybrid 
<https://developers.google.com/accounts/docs/OpenID#oauth>) or domain-wide 
delegation of authority (2LO 
<https://developers.google.com/accounts/docs/OAuth#GoogleAppsOAuth>).
Does it mean that it is impossble to use server to server authorization for 
the blogger API and the only possibility is using Authorization for Web 
Server 
Applications: https://developers.google.com/api-client-library/php/auth/web-app. 
BTW I've already tried it and it works fine for Blogger, but I need 
solution without authorization popup.

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