diff --git a/src/OAuth/GoogleOAuth.php b/src/OAuth/GoogleOAuth.php
index c339179..5f78ee2 100644
--- a/src/OAuth/GoogleOAuth.php
+++ b/src/OAuth/GoogleOAuth.php
@@ -15,7 +15,7 @@ class GoogleOAuth
         $this->request = $request;
     }
 
-    public function getDialogUrl(string $state, string $redirectUrl): string
+    public function getDialogUrl(string $state, string $redirectUrl, ?string $loginHint = null): string
     {
         $oauthParams = [
             'response_type' => 'code',
@@ -26,6 +26,10 @@ class GoogleOAuth
             'nonce' => hash('sha256', random_bytes(10) . microtime()),
         ];
 
+        if ($loginHint !== null) {
+            $oauthParams['login_hint'] = $loginHint;
+        }
+
         return self::$dialogUrlBase . '?' . http_build_query($oauthParams);
     }