diff --git a/src/AuthenticationResult.php b/src/AuthenticationResult.php
index cdcd7ed..d33520d 100644
--- a/src/AuthenticationResult.php
+++ b/src/AuthenticationResult.php
@@ -8,17 +8,17 @@
 
 class AuthenticationResult
 {
-    protected const FAILURE                     = 0;
-    protected const SUCCESS                     = 1;
-    protected const FAILURE_INVALID_CREDENTIALS = -1;
-    protected const FAILURE_IDENTITY_AMBIGUOUS  = -2;
-    protected const FAILURE_IDENTITY_NOT_FOUND  = -3;
-    protected const FAILURE_UNCATEGORIZED       = -4;
-    protected const FAILURE_MISSING_CREDENTIALS = -5;
+    public const FAILURE                     = 0;
+    public const SUCCESS                     = 1;
+    public const FAILURE_INVALID_CREDENTIALS = -1;
+    public const FAILURE_IDENTITY_AMBIGUOUS  = -2;
+    public const FAILURE_IDENTITY_NOT_FOUND  = -3;
+    public const FAILURE_UNCATEGORIZED       = -4;
+    public const FAILURE_MISSING_CREDENTIALS = -5;
 
     protected int $code;
 
-    protected IdentityInterface $identity;
+    protected ?IdentityInterface $identity = null;
 
     protected string $message = '';
 
diff --git a/test/AuthenticationResultTest.php b/test/AuthenticationResultTest.php
index 01574fa..0f84c13 100644
--- a/test/AuthenticationResultTest.php
+++ b/test/AuthenticationResultTest.php
@@ -13,17 +13,17 @@
 class AuthenticationResultTest extends TestCase
 {
     protected AuthenticationResult $subject;
-    protected IdentityInterface|MockObject $indentyInterfaceMock;
+    protected IdentityInterface|MockObject $identityInterfaceMock;
 
     /**
      * @throws Exception
      */
     protected function setUp(): void
     {
-        $this->indentyInterfaceMock = $this->createMock(IdentityInterface::class);
-        $this->indentyInterfaceMock->method('getId')->will($this->returnValue(10));
-        $this->indentyInterfaceMock->method('getName')->willReturn('username');
-        $this->subject = new AuthenticationResult(2, 'valid', $this->indentyInterfaceMock);
+        $this->identityInterfaceMock = $this->createMock(IdentityInterface::class);
+        $this->identityInterfaceMock->method('getId')->will($this->returnValue(10));
+        $this->identityInterfaceMock->method('getName')->willReturn('username');
+        $this->subject = new AuthenticationResult(2, 'valid', $this->identityInterfaceMock);
     }
 
     public function testAuth()