JWTLoginFilter.java

public class JWTLoginFilter extends AbstractAuthenticationProcessingFilter {

    public JWTLoginFilter(String defaultFilterProcessesUrl, AuthenticationManager authManager) {
        super(defaultFilterProcessesUrl);
        setAuthenticationManager(authManager);
    }

    @Override
    public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response) throws AuthenticationException, IOException, ServletException {
        AccountCredentials credentials = new ObjectMapper()
                .readValue(request.getInputStream(), AccountCredentials.class);
        return getAuthenticationManager().authenticate(
                new UsernamePasswordAuthenticationToken(
                        credentials.getUsername(),
                        credentials.getPassword(),
                        emptyList()
                ));
    }

    @Override
    protected void successfulAuthentication(HttpServletRequest request, HttpServletResponse response, FilterChain chain, Authentication authResult) throws IOException, ServletException {
        TokenAuthenticationService.addAuth(response, authResult.getName());
    }
}