feat: licenses administration basic authentication.

feat: accounts slug.
feat: duplicate accounts_balance table and merge balance with accounts table.
feat: refactoring customers and vendors.
feat: system user soft deleting.
feat: preventing build tenant database without any subscription.
feat: remove 'password' property from 'req.user' object.
feat: refactoring JournalPoster class.
feat: delete duplicated directories and files.

server/src/models/ViewColumn.js

@@ -9,14 +9,6 @@ export default class ViewColumn extends TenantModel {
     return 'view_has_columns';
   }
 
-  /**
-   * Timestamp columns.
-   */
-  static get hasTimestamps() {
-    return false;
-  }
-
-
   /**
    * Relationship mapping.
    */