LootLocker Steam Auth Example.cs

using LootLocker.Requests;
using Steamworks;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using UnityEngine;

public class NewBehaviourScript : MonoBehaviour
{
    void Start()
    {
        if (!SteamManager.Initialized)
        {
            return;
        }

        var ticket = new byte[1024];
        SteamUser.GetAuthSessionTicket(ticket, 1024, out uint ticketSize);

        Array.Resize(ref ticket, (int)ticketSize);
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < ticketSize; i++)
        {
            sb.AppendFormat("{0:x2}", ticket[i]);
        }
        var steamSessionTicket = sb.ToString();

        LootLockerSDKManager.VerifySteamID(steamSessionTicket, (response) =>
        {
            if (!response.success)
            {
                Debug.Log("error verifying steam ID");
                return;
            }

            Debug.Log("successfully verified steam user");

            CSteamID SteamID = SteamUser.GetSteamID();
            LootLockerSDKManager.StartSession(SteamID.ToString(), (response) =>
            {
                if (!response.success)
                {
                    Debug.Log("error starting session");
                    return;
                }

                Debug.Log("session started!");
            });
        });
    }
}

gist is outdated a little