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/repositories/VendorRepository.ts

@@ -0,0 +1,50 @@
+import TenantRepository from "./TenantRepository";
+
+
+export default class VendorRepository extends TenantRepository {
+  models: any;
+  cache: any;
+
+  /**
+   * Constructor method.
+   * @param {number} tenantId 
+   */
+  constructor(tenantId: number) {
+    super(tenantId);
+
+    this.models = this.tenancy.models(tenantId);
+    this.cache = this.tenancy.cache(tenantId);
+  }
+
+  /**
+   * Retrieve the bill that associated to the given vendor id.
+   * @param {number} vendorId 
+   */
+  getBills(vendorId: number) {
+    const { Bill } = this.models;
+
+    return this.cache.get(`vendors.bills.${vendorId}`, () => {
+      return Bill.query().where('vendor_id', vendorId);
+    });
+  }
+
+  /**
+   * 
+   * @param {numner[]} vendorsIds 
+   */
+  vendors(vendorsIds: number[]) {
+    const { Contact } = this.models;
+    return Contact.query().modifier('vendor').whereIn('id', vendorsIds);
+  }
+
+  /**
+   * 
+   * @param {number[]} vendorIds 
+   */
+  vendorsWithBills(vendorIds: number[]) {
+    const { Contact } = this.models;
+    return Contact.query().modify('vendor')
+      .whereIn('id', vendorIds)
+      .withGraphFetched('bills');
+  }
+}