diff --git a/AccessGridTest/AccessPassEventTests.cs b/AccessGridTest/AccessPassEventTests.cs
new file mode 100644
index 0000000..01860cf
--- /dev/null
+++ b/AccessGridTest/AccessPassEventTests.cs
@@ -0,0 +1,80 @@
+namespace AccessGridTest;
+
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using AccessGrid;
+using NUnit.Framework;
+
+[TestFixture]
+public class AccessPassEventTests
+{
+    private JsonSerializerOptions _jsonOptions;
+
+    [SetUp]
+    public void SetUp()
+    {
+        _jsonOptions = new JsonSerializerOptions
+        {
+            PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
+            DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull,
+            Converters = { new JsonStringEnumConverter() }
+        };
+    }
+
+    [Test]
+    public void Deserialize_ShouldIncludeAppleUserId_WhenPresent()
+    {
+        var json = """
+        {
+            "id": "ap_123",
+            "card_template_id": "ct_456",
+            "state": "active",
+            "full_name": "Jane Doe",
+            "apple_user_id": "001234.abc567def890.1234",
+            "card_templates": [],
+            "devices": []
+        }
+        """;
+
+        var evt = JsonSerializer.Deserialize<AccessPassEvent>(json, _jsonOptions);
+
+        Assert.That(evt.AppleUserId, Is.EqualTo("001234.abc567def890.1234"));
+    }
+
+    [Test]
+    public void Deserialize_ShouldHaveNullAppleUserId_WhenAbsent()
+    {
+        var json = """
+        {
+            "id": "ap_123",
+            "card_template_id": "ct_456",
+            "state": "active",
+            "card_templates": [],
+            "devices": []
+        }
+        """;
+
+        var evt = JsonSerializer.Deserialize<AccessPassEvent>(json, _jsonOptions);
+
+        Assert.That(evt.AppleUserId, Is.Null);
+    }
+
+    [Test]
+    public void Deserialize_ShouldHaveNullAppleUserId_WhenExplicitlyNull()
+    {
+        var json = """
+        {
+            "id": "ap_123",
+            "card_template_id": "ct_456",
+            "state": "active",
+            "apple_user_id": null,
+            "card_templates": [],
+            "devices": []
+        }
+        """;
+
+        var evt = JsonSerializer.Deserialize<AccessPassEvent>(json, _jsonOptions);
+
+        Assert.That(evt.AppleUserId, Is.Null);
+    }
+}
diff --git a/AccessGridTest/VersionConsistencyTests.cs b/AccessGridTest/VersionConsistencyTests.cs
new file mode 100644
index 0000000..7089269
--- /dev/null
+++ b/AccessGridTest/VersionConsistencyTests.cs
@@ -0,0 +1,26 @@
+namespace AccessGridTest;
+
+using System.IO;
+using System.Text.RegularExpressions;
+using NUnit.Framework;
+
+[TestFixture]
+public class VersionConsistencyTests
+{
+    [Test]
+    public void ReadmeVersion_ShouldMatchCsprojVersion()
+    {
+        var repoRoot = Path.GetFullPath(Path.Combine(TestContext.CurrentContext.TestDirectory, "..", "..", "..", ".."));
+
+        var csproj = File.ReadAllText(Path.Combine(repoRoot, "src", "AccessGrid.csproj"));
+        var csprojMatch = Regex.Match(csproj, @"<Version>(.+?)</Version>");
+        Assert.That(csprojMatch.Success, Is.True, "Could not find <Version> in csproj");
+
+        var readme = File.ReadAllText(Path.Combine(repoRoot, "README.md"));
+        var readmeMatch = Regex.Match(readme, @"-Version\s+(\S+)");
+        Assert.That(readmeMatch.Success, Is.True, "Could not find version in README");
+
+        Assert.That(readmeMatch.Groups[1].Value, Is.EqualTo(csprojMatch.Groups[1].Value),
+            "README version does not match csproj version");
+    }
+}
diff --git a/README.md b/README.md
index d8fe4d2..6a7d1f8 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ Official C# SDK for interacting with the AccessGrid API.
 ## Installation
 
 ```
-Install-Package accessgrid -Version 1.2.1
+Install-Package accessgrid -Version 1.2.2
 ```
 
 ## Authentication