function validate_credentials() {
        $this->load->model('eloki_model');
        $query = $this->eloki_model->validateUser();
        $query2 = $this->eloki_model->validateAdmin();
        $username = $this->input->post('username');
        if ($query) {

            if ($query2) {

                $data = array(
                    'username' => $username,
                    'is_logged_in' => true,
                    'is_admin' => true
                );
            } else {
                $data = array(
                    'username' => $username,
                    'is_logged_in' => true
                );
            }

            $this->session->set_userdata($data);

            //if (empty($this->session->flashdata('prev_page'))) {
            //redirect('controlpanel');
            $this->session->keep_flashdata('prev_page');
            if ($this->session->flashdata('prev_page') == base_url() || base_url() . '/taxonomy') {
                redirect('controlpanel');
            } else {
                redirect($this->session->flashdata('prev_page'));
            }
        } else {

            $data['main_content'] = 'login_error';
            $this->load->view('includes/templatetest', $data);
        }
    }