Deactivation of Users with REST API, Users activation based on Domain registration

Hi Team,

There are two scenarios, is there any option to deactivate the users who have not logged into the Jira/Confluence past 90 days/'X' number of days with REST API endpoints. We don't want any add-on.

--> Identification and deactivation of the users

--> Getting of logged in user details with REST API, there is no option

Second scenario, how to restrict the invite option from the people menu. either registered domain / non registered domain people? This option should be deactivated for the team members. It should be optional. 

Regards,

Narni