Only set cookie if result->token is not null

Author: carl-wells-crowdhandler

src/GateKeeper.php

@@ -204,9 +204,11 @@ public function getRedirectUrl()
      * Set CrowdHandler session cookie 
      */
     public function setCookie()
-    {
-        setcookie(self::TOKEN_COOKIE, $this->result->token, 0, '/', '', $this->debug ? false: true);
-        $this->debug('Setting cookie '.$this->result->token);
+    {   
+        if (!is_null($this->result->token)) {
+            setcookie(self::TOKEN_COOKIE, $this->result->token, 0, '/', '', $this->debug ? false: true);
+            $this->debug('Setting cookie '.$this->result->token);
+        }
     }
 
     /**