Build a signup API that registers with an email and a password. Accept the signup, store it, and return the created id. Complete the signup. Note: POST /users takes {email, password} and responds with 201 and an id.
This challenge has you build an email/password signup API in NestJS. For POST /users you take a {email, password} body, store it in the in-memory store, and return 201 with the created id. You practice the flow of taking request data that arrives from outside and processing it.
This problem is about how an API takes in and handles request data that arrives from outside. At a door like signup — where external input first enters the system — the key is wiring up a clear flow: take the {email, password} body, store it, and return 201 with the created id. You confirm in real code that a normal signup request is stored and answered with 201.