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/TenantModel.js

@@ -1,17 +1,5 @@
 import BaseModel from '@/models/Model';
 
 export default class TenantModel extends BaseModel {
-  static tenant() {
-    if (!this.knexBinded) {
-      throw new Error('Tenant knex is not binded yet.');
-    }
-    return super.bindKnex(this.knexBinded);
-  }
 
-  /**
-   * Allow to embed models to express request.
-   */
-  static requestModel() {
-    return true;
-  }
 }