API Controller : Cannot PUT, Cannot DELETE (404 not found)
Judging from msg Cannot PUT /hero you are making a /hero request rather than for example /hero/1
The request for this is localhost:3000/hero (same endpoint as GET and POST), i've tried either by adding a id:1 in Params or in the Body with x-www-form-urlencoded.
The PUT request should be done with localhost:3000/hero/<id_here> Think you are confusing query params with path params.
Simmilarly DELETE should be done on localhost:3000/hero/delete/<id_here>