AuthenticationTokenFilter.java

public class AuthenticationTokenFilter extends UsernamePasswordAuthenticationFilter {

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {

        HttpServletRequest httpRequest = (HttpServletRequest) request;
        String authorizationToken = httpRequest.getHeader(HttpHeaders.AUTHORIZATION);

        if (authorizationToken != null && authorizationToken.equals("winteriscoming")) {
            SecurityContextHolder.getContext()
                    .setAuthentication(new UsernamePasswordAuthenticationToken("manjula", null, Collections.emptyList()));
        }

        chain.doFilter(request, response);
    }

}