message: import - minor code polish
diff: @@ -64,7 +64,6 @@ export default class ImportAsyncTask extends AbstractAsyncTask {
  }
  protected async checkSitesAndAssign(tenant: Tenant, newUser: User, importedUser: ImportedUser|ImportedTag): Promise<void> {
  - let site: Site = null;
  // Saved sites for assignement
  const sitesToBeAssigned: string[] = [];
  const importedSites = importedUser.siteIDs.split('|');
  @@ -75,13 +74,15 @@ export default class ImportAsyncTask extends AbstractAsyncTask {
  sitesToBeAssigned.push(siteID);
  }
  continue;
  + }
  // check if site exists
  - } else if (!Utils.isNullOrUndefined(site = await SiteStorage.getSite(tenant, siteID))) {
  + const site = await SiteStorage.getSite(tenant, siteID);
  + if (site) {
  if (site.autoUserSiteAssignment) {
  this.existingSitesToAutoAssign[siteID] = true;
  sitesToBeAssigned.push(siteID);
  - // if site exists but does not allow auto assignment
  } else {
  + // if site exists but does not allow auto assignment
  this.existingSitesToAutoAssign[siteID] = false;
  await Logging.logWarning({
  tenantID: tenant.id,
  @@ -90,8 +91,8 @@ export default class ImportAsyncTask extends AbstractAsyncTask {
  message: `Site ${siteID} does not accept auto assignment`
  });
  }
  - // if site does not exist
  } else {
  + // if site does not exist
  this.existingSitesToAutoAssign[siteID] = false;
  await Logging.logWarning({
  tenantID: tenant.id,
  