diff --git a/Facepunch.Steamworks.Test/Client.cs b/Facepunch.Steamworks.Test/Client.cs
index 12276d7..a18bf88 100644
--- a/Facepunch.Steamworks.Test/Client.cs
+++ b/Facepunch.Steamworks.Test/Client.cs
@@ -40,5 +40,22 @@ public void ClientSteamId()
                 Assert.AreNotEqual( 0, steamid );
             }
         }
+
+        [TestMethod]
+        public void ClientAuthSessionTicket()
+        {
+            using ( var client = new Facepunch.Steamworks.Client( 252490 ) )
+            {
+                var ticket = client.GetAuthSessionTicket();
+
+                Assert.IsTrue( ticket != null );
+                Assert.IsTrue( ticket.Handle != 0 );
+                Assert.IsTrue( ticket.Data.Length > 0 );
+
+                client.CancelAuthTicket( ticket );
+
+                Assert.IsTrue( ticket.Handle == 0 );
+            }
+        }
     }
 }
diff --git a/Facepunch.Steamworks/Client.Auth.cs b/Facepunch.Steamworks/Client.Auth.cs
new file mode 100644
index 0000000..cb2f440
--- /dev/null
+++ b/Facepunch.Steamworks/Client.Auth.cs
@@ -0,0 +1,51 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace Facepunch.Steamworks
+{
+    public partial class Client : IDisposable
+    {
+        public class AuthTicket
+        {
+            public byte[] Data;
+            public uint Handle;
+        }
+
+        /// <summary>
+        /// Creates an auth ticket. 
+        /// Which you can send to a server to authenticate that you are who you say you are.
+        /// </summary>
+        public unsafe AuthTicket GetAuthSessionTicket()
+        {
+            var data = new byte[1024];
+          
+            fixed ( byte* b = data )
+            {
+                uint ticketLength = 0;
+                uint ticket = _user.GetAuthSessionTicket( (IntPtr) b, data.Length, ref ticketLength );
+
+                if ( ticket == 0 )
+                    return null;
+
+                return new AuthTicket()
+                {
+                    Data = data.Take( (int)ticketLength ).ToArray(),
+                    Handle = ticket
+                };
+            }
+        }
+
+        /// <summary>
+        /// Cancels a ticket. 
+        /// You should cancel your ticket when you close the game or leave a server.
+        /// </summary>
+        public void CancelAuthTicket( AuthTicket ticket )
+        {
+            _user.CancelAuthTicket( ticket.Handle );
+            ticket.Handle = 0;
+            ticket.Data = null;
+        }
+    }
+}
diff --git a/Facepunch.Steamworks/Client.cs b/Facepunch.Steamworks/Client.cs
index 6ee2c9b..8f2aaea 100644
--- a/Facepunch.Steamworks/Client.cs
+++ b/Facepunch.Steamworks/Client.cs
@@ -5,7 +5,7 @@
 
 namespace Facepunch.Steamworks
 {
-    public class Client : IDisposable
+    public partial class Client : IDisposable
     {
         private Valve.Steamworks.ISteamClient _client;
         private uint _hpipe;
diff --git a/Facepunch.Steamworks/Facepunch.Steamworks.csproj b/Facepunch.Steamworks/Facepunch.Steamworks.csproj
index 33bc167..5732628 100644
--- a/Facepunch.Steamworks/Facepunch.Steamworks.csproj
+++ b/Facepunch.Steamworks/Facepunch.Steamworks.csproj
@@ -21,6 +21,7 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <DebugType>pdbonly</DebugType>
@@ -31,6 +32,7 @@
     <WarningLevel>4</WarningLevel>
     <DocumentationFile>
     </DocumentationFile>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
@@ -41,6 +43,7 @@
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="Client.Auth.cs" />
     <Compile Include="Client.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="steam_api_interop.cs" />