Fix Psalm issues

Author: tvdijen

lib/Auth/Source/YubiKey.php

@@ -137,6 +137,9 @@ public static function handleLogin($authStateId, $otp)
 
         /* Retrieve the authentication state. */
         $state = \SimpleSAML\Auth\State::loadState($authStateId, self::STAGEID);
+        if (is_null($state)) {
+            throw new \SimpleSAML\Error\NoState();
+        }
 
         /* Find authentication source. */
         Assert::keyExists($state, self::AUTHID);

www/yubikeylogin.php

@@ -18,7 +18,7 @@
 $t = new \SimpleSAML\XHTML\Template($globalConfig, 'authYubiKey:yubikeylogin.php');
 $translator = $t->getTranslator();
 
-$errorCode = null;
+$errorCode = [];
 if (array_key_exists('otp', $_REQUEST)) {
     // attempt to log in
     $errorCode = \SimpleSAML\Module\authYubiKey\Auth\Source\YubiKey::handleLogin($authStateId, $_REQUEST['otp']);