fix error

lib/ldap_login/login.rb

@@ -8,6 +8,8 @@ module LdapLogin::Login
     ldap_pass = params[:password]
     login_flag = false
     _session = {'ad' => []}
+    url = '/'
+    url_method = 'redirect_to'
     ldap_hosts.each do |ldap_host|
       begin
         ldap = Net::LDAP.new