ImportModel::authenticateAdminUser PHP Method

    public function authenticateAdminUser()
    {
        $OverwriteEmail = val('OverwriteEmail', $this->Data);
        $OverwritePassword = val('OverwritePassword', $this->Data);
        $Data = Gdn::sql()->getWhere('zUser', array('Email' => $OverwriteEmail));
        if ($Data->numRows() == 0) {
            $Result = false;
        } else {
            $Result = true;
        }
        if (!$Result) {
            $this->Validation->addValidationResult('Email', t('ErrorCredentials'));
            $this->ErrorType = 'Credentials';
        }
        return $Result;
    }