Add find invitation by token method

lib/UserManagement.php

@@ -434,6 +434,30 @@ public function getInvitation($invitationId)
         return Resource\Invitation::constructFromResponse($response);
     }
 
+    /**
+     * Find an Invitation by Token
+     *
+     * @param string $invitationToken The token of the Invitation
+     *
+     * @throws Exception\WorkOSException
+     *
+     * @return \WorkOS\Resource\Invitation
+     */
+    public function findInvitationByToken($invitationToken)
+    {
+        $path = "/user_management/invitations/by_token/{$invitationToken}";
+
+        $response = Client::request(
+            Client::METHOD_GET,
+            $path,
+            null,
+            null,
+            true
+        );
+
+        return Resource\Invitation::constructFromResponse($response);
+    }
+
     /**
      * List Invitations
      *

tests/WorkOS/UserManagementTest.php

@@ -1102,6 +1102,29 @@ public function testGetInvitation()
         $this->assertSame($response->toArray(), $expected);
     }
 
+    public function testFindInvitationByToken()
+    {
+        $invitationToken = "Z1uX3RbwcIl5fIGJJJCXXisdI";
+        $path = "/user_management/invitations/by_token/{$invitationToken}";
+
+        $result = $this->invitationResponseFixture();
+
+        $this->mockRequest(
+            Client::METHOD_GET,
+            $path,
+            null,
+            null,
+            true,
+            $result
+        );
+
+        $response = $this->userManagement->findInvitationByToken($invitationToken);
+
+        $expected = $this->invitationFixture();
+
+        $this->assertSame($response->toArray(), $expected);
+    }
+
     public function testListInvitations()
     {
         $path = "/user_management/invitations";