Example: JavaScript

/** Vivox Token Generation Example - JavaScript** NOTE: There are multiple ways to handle SHA-256 in JavaScript* Stanford JS Crypto Library - https://crypto.stanford.edu/sjcl/ (used below)* Source - http://bitwiseshiftleft.github.io/sjcl/sjcl.js* SHA256 from NPM - https://www.npmjs.com/package/sha256**/function vxGenerateToken(key, payload) {    // Header is static - base64url encoded {}    var base64urlHeader = base64URLEncode("{}"); // Can also be defined as a constant "e30"    // Encode payload    var base64urlPayload = base64URLEncode(payload);    // Join segments to prepare for signing    var segments = [base64urlHeader, base64urlPayload];    var toSign = segments.join(".");    // Sign token with key and SHA-256    var hmac = new sjcl.misc.hmac(sjcl.codec.utf8String.toBits(key), sjcl.hash.sha256);    signature = sjcl.codec.base64.fromBits(hmac.encrypt(toSign));    var base64urlSigned = signature.replace(/\+/g, "-").replace(/\//g, "_").replace(/\=+$/, "");    segments.push(base64urlSigned);    return segments.join(".");}function base64URLEncode(value) {    return Base64.encode(value).replace(/\+/g, "-").replace(/\//g, "_").replace(/\=+$/, "");}claims = {    "iss": "issuer",    "exp": 1559359105,    "vxa": "join",    "f": "sip:.username.@domain.vivox.com",    "t": "sip:confctl-g-channelname@domain.vivox.com"};// Example usagevar token = vxGenerateToken("secret", claims);console.log(token);