Why do all my back requests work but give an error?

Question

Angular

I'm doing a project on angular and nest js, at the moment I'm busy with registration and authorization and generally work with users. I wrote a controller that processes my requests and sends a response via @Res(), the response to the request comes and the status code too, but as an error

I understand that the point is how I send the response, something with json, but I don’t understand what the problem is
. Just in case, I’ll attach pieces of code
registration component (angular)

auth service (angular)

users service (nest)

users controller (nest)

Answer 1

Well, the problem was just that I was sending the status, but I just had to write .status(...).send({})

Answer 2

English in black says that there is a problem with json, and you show us pictures here))