Unable to find assigned counts of Projects in ERPNEXT

Please help me with this

In Project module of ERPNEXT, when we click on it and Dashboard is loaded then this end point gets called http://172.16.21.150:5000/app/Project.
On checking request being sent to fetch count of open projects under the logined user this gets called http://172.16.21.150:5000/api/method/frappe.desk.reportview.get_count but payload is doctype: Project filters: [[“Project”,“status”,“=”,“p”,false]] fields: [] distinct: false

I want to change the payload like this doctype: Task filters: {“_assign”:[“like”,“%mail@abhinaba.com%”],“status”:“Open”} fields: [] distinct: false

  1. I am unable to find how does this payload is being given to this request?
  2. Secondly, Which file of ERPNEXt handles endpoints like apps/home, /apps/projects ,/apps/hr etc