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[UE5] EOS token retrieval example using Steamworks auth ticket

This example shows concepts below:

• [UE5] how to authenticate EOS with external auth token. For this case, Steamworks auth ticket is used.
• [UE5] how to generate EOS JWT
• [Typescript] how to verify EOS JWT

To verify JWT, you need to install extra typescript libraries:

npm install jsonwebtoken jwks-rsa @types/jsonwebtoken @types/jwks-rsa

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// +build ignore
package main

import (
	"bytes"
	"flag"
	"io"
	"io/ioutil"
	"log"
	"os"

nullbus

// Copyright 2018 Yassine Riahi and Liam Flookes. Provided under a MIT License, see license file on github.
// Used to generate a fastbuild .bff file from UnrealBuildTool to allow caching and distributed builds. 
// Tested with Windows 10, Visual Studio 2015/2017, Unreal Engine 4.19.1, FastBuild v0.95
// Durango is fully supported (Compiles with VS2015).
// Orbis will likely require some changes.
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Diagnostics;

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package main

import (
	"bytes"
	"io/ioutil"
	"log"
	"os"
	"path/filepath"
	"regexp"
	"strings"