Override assignment deadlines for groups via API

Hello, 

Is it possible to change the deadline for submitting an assignment for a group in the course via the API?

I can't find any information on how the due date for groups in  assignment is stored. Is this an attribute stored by the 'tasks' module? Is the group attribute?

Is this data stored in some database that I can access using the API and overwrite it?

I mean these settings for the assignment.

https://docs.moodle.org/402/en/Using_Assignment#You_want_students_to_submit_work_in_groups

I will be very grateful for any tips!