public SignInWrapper call(SignInInput input) throws MpxConnectorException{
    LOGGER.debug("START - AbstractMpxConnector.SingInConnector.call");

    RestTemplate restTemplate = new RestTemplate();
    ObjectMapper mapper = new ObjectMapper();

    byte[] sessionKeyEncrypted = null;
    byte[] userInfoEncrypted = null;

    try{
        String userJson = mapper.writeValueAsString(input.getUserInfo());

        sessionKeyEncrypted = encrypt(input.getRandomSymmetricSessionKey(), ENCRYPT_ALGORITHM.RSA);
        userInfoEncrypted = encrypt(userJson, input.getRandomSymmetricSessionKey(), ENCRYPT_ALGORITHM.RC4);
    }catch(Exception e){
        LOGGER.error("Error encrypt: ", e);
    }

    String username = MPX_SIGNIN_PID + "/" + input.getUserInfo().getUserName();
    String password = Base64Utils.encodeToString(sessionKeyEncrypted) + "|" + Base64Utils.encodeToString(userInfoEncrypted);

    HttpEntity<String> entity = new HttpEntity<String>(getUserProperty(this.duration, this.idleTimeout), configureBasicAuthorization(username, password));

    UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(MPX_SIGNIN).queryParam("account", MPX_SIGNIN_ACCOUNT);

    ResponseEntity<SignInWrapper> response = restTemplate.exchange(builder.build().toString(), HttpMethod.POST, entity, SignInWrapper.class);

    super.exceptionManager(response);
    super.exceptionManager(response.getBody().getAdditionalProperties());

    LOGGER.debug("STOP - AbstractMpxConnector.SingInConnector.call");

    return response.getBody();
}

protected HttpHeaders configureBasicAuthorization(String username, String password) {
    return new HttpHeaders() {
        private static final long serialVersionUID = 1L;
        {
            if(username != null && password != null) {
                String auth = username + ":" + password;
                String authHeader = "Basic " + Base64Utils.encodeToString(auth.getBytes());
                LOGGER.debug("USERNAME: {} HEADER: {}", username, authHeader);
                set("Authorization", authHeader);
            }
        }
    };
}