Accessing push data set api with azure function app - power bi service

Hi Amine,

I am not sure if this answers my question.
I will give some context as to my use case which might make it clearer what i mean.

My team already has a Power Bi service capacity up and running with multiple workspaces and  reports that use import mode.
Now we need to use push datasets for a real-time dashboard.
We already have the source of the data, so all we need is a server side application that can load this data into memory and push it to the push dataset.

Now on to my question.
If the app registration is in power bi embedded, then how do i grant that application access to the workspaces and datasets of the power bi service capacity?

This is a question of how to grant access to the Power BI service API for a server side application, not about how to access it for an embedded application.