/**
  * @param string $sTenantLogin
  * @param string $sTenantPassword Default value is **null**.
  *
  * @return string
  */
 public function getTenantIdByLogin($sTenantLogin, $sTenantPassword = null)
 {
     $sAdd = '';
     if (null !== $sTenantPassword) {
         $sAdd = sprintf(' AND login_enabled = 1 AND disabled = 0 AND %s = %s', $this->escapeColumn('password'), $this->escapeString(CTenant::hashPassword($sTenantPassword)));
     }
     $sSql = 'SELECT id_tenant FROM %sawm_tenants WHERE %s = %s%s';
     return sprintf($sSql, $this->prefix(), $this->escapeColumn('login'), $this->escapeString($sTenantLogin), $sAdd);
 }