MagentoFrameworkFilesystemIoSftp $ftp
   ){
       $this->ftp = $ftp;
   }

   public function uploadFile(){
       $open = $this->ftp->open(
                   array(
                       'host' => 'hostname here',
                       'username' => 'username',
                       'password' => 'password'
                   )
               );
}