What do these lines of code do?

[gistmap]

hello, I can't understand what these line of code do.

URI location = ServletUriComponentsBuilder
                .fromCurrentContextPath().path("/users/{username}")
                .buildAndExpand(result.getUsername()).toUri();

return ResponseEntity.created(location).body(new ApiResponse(true, "User registered successfully"));

[jhefreyzz]

Hello, it means it will return 201 HTTP response and sets the Location in this case location in the response headers