asp.net - Routing of Api Controllers Design -

i'm creating dotnet core web api , have defined api spec. have users can have assignments linked eachother.

for creating user i'm using route:

post /users {   "name": "user name" } 

this done within userscontroller

for creating assignment , hook user thought of url: /users/{userid}/assignments , adding get/post/patch/delete method.

my question: 1 split in multiple controllers (userscontroller , assignmentcontroller) or 1 controller (userscontroller) , generate routes there?

it personal preference, , depends on how big userscontroller is.

if have many codes in userscontroller, might consider creating assignmentcontroller. following single responsibility principle.

on other hand, if inside userscontroller related user, i'll keep there. you can @ this controller sample.