How to use the node-opcua-service-endpoints.UserIdentityTokenType function in node-opcua-service-endpoints

}

};


function findUserTokenByPolicy(endpoint_description, policyId) {
    assert(endpoint_description instanceof EndpointDescription);
    const r = _.filter(endpoint_description.userIdentityTokens, function (userIdentity) {
        // assert(userIdentity instanceof UserTokenPolicy)
        assert(userIdentity.tokenType);
        return userIdentity.policyId === policyId;
    });
    return r.length === 0 ? null : r[0];
}

const UserIdentityTokenType = require("node-opcua-service-endpoints").UserIdentityTokenType;

function findUserTokenPolicy(endpoint_description, userTokenType) {
    assert(endpoint_description instanceof EndpointDescription);
    const r = _.filter(endpoint_description.userIdentityTokens, function (userIdentity) {
        // assert(userIdentity instanceof UserTokenPolicy)
        assert(userIdentity.tokenType);
        return userIdentity.tokenType === userTokenType;
    });
    return r.length === 0 ? null : r[0];
}

function createAnonymousIdentityToken(endpoint_desc) {
    assert(endpoint_desc instanceof EndpointDescription);
    const userTokenPolicy = findUserTokenPolicy(endpoint_desc, UserIdentityTokenType.ANONYMOUS);
    if (!userTokenPolicy) {
        throw new Error("Cannot find ANONYMOUS user token policy in end point description");

const ApplicationType = endpoints_service.ApplicationType;
const EndpointDescription = endpoints_service.EndpointDescription;
const MessageSecurityMode = require("node-opcua-service-secure-channel").MessageSecurityMode;

const SecurityPolicy = require("node-opcua-secure-channel").SecurityPolicy;
const getCryptoFactory = require("node-opcua-secure-channel").getCryptoFactory;
const fromURI = require("node-opcua-secure-channel").fromURI;

const crypto_utils = require("node-opcua-crypto");
const UserNameIdentityToken = session_service.UserNameIdentityToken;


const buffer_utils = require("node-opcua-buffer-utils");
const createFastUninitializedBuffer = buffer_utils.createFastUninitializedBuffer;

const UserIdentityTokenType = require("node-opcua-service-endpoints").UserIdentityTokenType;

const ClientSession = require("./client_session").ClientSession;

const utils = require("node-opcua-utils");
const debugLog = require("node-opcua-debug").make_debugLog(__filename);
const doDebug = require("node-opcua-debug").checkDebugFlag(__filename);

const OPCUAClientBase = require("./client_base").OPCUAClientBase;
const isNullOrUndefined = require("node-opcua-utils").isNullOrUndefined;

function validateServerNonce(serverNonce) {
    return (serverNonce && serverNonce.length < 32) ? false : true;
}

/**
 * @class OPCUAClient

module.exports.browse_service = require("node-opcua-service-browse");
module.exports.read_service = require("node-opcua-service-read");
module.exports.write_service = require("node-opcua-service-write");
module.exports.call_service = require("node-opcua-service-call");

module.exports.session_service = require("node-opcua-service-session");
module.exports.AnonymousIdentityToken = module.exports.session_service.AnonymousIdentityToken;
module.exports.UserNameIdentityToken = module.exports.session_service.UserNameIdentityToken;

module.exports.register_node_service = require("node-opcua-service-register-node");

module.exports.get_endpoints_service = require("node-opcua-service-endpoints");
module.exports.EndpointDescription = require("node-opcua-service-endpoints").EndpointDescription;
module.exports.ApplicationType = require("node-opcua-service-endpoints").ApplicationType;
module.exports.UserTokenPolicy = require("node-opcua-service-endpoints").UserTokenPolicy;
module.exports.UserIdentityTokenType = require("node-opcua-service-endpoints").UserIdentityTokenType;

module.exports.subscription_service = require("node-opcua-service-subscription");
module.exports.historizing_service = require("node-opcua-service-history");
module.exports.discovery_service = require("node-opcua-service-discovery");
module.exports.secure_channel_service = require("node-opcua-service-secure-channel");

module.exports.translate_browse_paths_to_node_ids_service = require("node-opcua-service-translate-browse-path");
module.exports.BrowsePath = require("node-opcua-service-translate-browse-path").BrowsePath;
module.exports.makeRelativePath = require("node-opcua-service-translate-browse-path").makeRelativePath;
module.exports.makeBrowsePath = require("node-opcua-service-translate-browse-path").makeBrowsePath;

module.exports.query_service = require("node-opcua-service-query");
module.exports.node_managment_service = require("node-opcua-service-node-management");

module.exports.ServerState = require("node-opcua-common").ServerState;
module.exports.ServiceCounter = require("node-opcua-common").ServiceCounter;