As of now we are getting approval notification to approver there we can add approve button also without login simply user can click on approve or reject
Token should work for that particular doc EX:Leave Application/001
Hey @python_a,
You may create a custom post api endpoint where in you may mark it as approve or reject and submit it.
Just a personal suggestion that it is better that user should be logged in for post api from security perspective.
Shubham