@PostMapping("/authenticate")
public ResponseEntity<JWTToken> authorize(@Valid @RequestBody LoginVM loginVM) {
  
  UsernamePasswordAuthenticationToken authenticationToken =
    new UsernamePasswordAuthenticationToken(loginVM.getUsername(), loginVM.getPassword());
  
  Authentication authentication = authenticationManagerBuilder.getObject().authenticate(authenticationToken);
  SecurityContextHolder.getContext().setAuthentication(authentication);
  boolean rememberMe = (loginVM.isRememberMe() == null) ? false : loginVM.isRememberMe();
  String jwt = tokenProvider.createToken(authentication, rememberMe);
  HttpHeaders httpHeaders = new HttpHeaders();
  httpHeaders.add(JWTFilter.AUTHORIZATION_HEADER, "Bearer " + jwt);
  return new ResponseEntity<>(new JWTToken(jwt), httpHeaders, HttpStatus.OK);
}