diff --git a/server/src/http/controllers/Authentication.ts b/server/src/http/controllers/Authentication.ts
index 83f74d632..45fc69bd7 100644
--- a/server/src/http/controllers/Authentication.ts
+++ b/server/src/http/controllers/Authentication.ts
@@ -139,6 +139,7 @@ export default class AuthenticationController extends BaseController{
       const registeredUser: ISystemUser = await this.authService.register(registerDTO);
 
       return res.status(200).send({
+        type: 'success',
         code: 'REGISTER.SUCCESS',
         message: 'Register organization has been success.',
       });
@@ -153,7 +154,7 @@ export default class AuthenticationController extends BaseController{
           errorReasons.push({ type: 'EMAIL.EXISTS', code: 200 });
         }
         if (errorReasons.length > 0) {
-          return res.status(200).send({ errors: errorReasons });
+          return res.boom.badRequest(null, { errors: errorReasons });
         }
       }
       next();
diff --git a/server/src/http/controllers/Items.ts b/server/src/http/controllers/Items.ts
index 583b1accd..7a9b5accf 100644
--- a/server/src/http/controllers/Items.ts
+++ b/server/src/http/controllers/Items.ts
@@ -173,7 +173,6 @@ export default class ItemsController {
 
     const foundItems: [] = await Item.query().onBuild((builder: any) => {
       builder.where('name', item.name);
-
       if (itemId) {
         builder.whereNot('id', itemId);
       }
diff --git a/server/src/http/index.js b/server/src/http/index.ts
similarity index 91%
rename from server/src/http/index.js
rename to server/src/http/index.ts
index 0209bb39a..d2c1702a2 100644
--- a/server/src/http/index.js
+++ b/server/src/http/index.ts
@@ -33,9 +33,8 @@ import Resources from './controllers/Resources';
 import ExchangeRates from '@/http/controllers/ExchangeRates';
 import Media from '@/http/controllers/Media';
 import Ping from '@/http/controllers/Ping';
-import Agendash from '@/http/controllers/Agendash';
 import Subscription from '@/http/controllers/Subscription';
-import LicensesController from '@/http/controllers/Subscription/Licenses';
+import Licenses from '@/http/controllers/Subscription/Licenses';
 
 export default () => {
   const app = Router();
@@ -45,11 +44,11 @@ export default () => {
   app.use('/auth', Container.get(Authentication).router());
   app.use('/invite', Container.get(InviteUsers).nonAuthRouter());
   app.use('/organization', Container.get(Organization).router());
-  app.use('/licenses', Container.get(LicensesController).router());
+  app.use('/licenses', Container.get(Licenses).router());
   app.use('/subscription', Container.get(Subscription).router());
   app.use('/ping', Container.get(Ping).router());
 
-  const dashboard = Router(); 
+  const dashboard = Router();
 
   dashboard.use(JWTAuth);
   dashboard.use(AttachCurrentTenantUser)
@@ -77,9 +76,8 @@ export default () => {
   dashboard.use('/purchases', Purchases.router());
   dashboard.use('/resources', Resources.router());
   dashboard.use('/exchange_rates', ExchangeRates.router());
-  dashboard.use('/media', Media.router());
+  dashboard.use('/media', Media.router())
 
-  app.use('/agendash', Agendash.router());
   app.use('/', dashboard);
 
   return app;
diff --git a/server/src/http/middleware/ConfiguredMiddleware.js b/server/src/http/middleware/ConfiguredMiddleware.ts
similarity index 61%
rename from server/src/http/middleware/ConfiguredMiddleware.js
rename to server/src/http/middleware/ConfiguredMiddleware.ts
index 899053d91..40064320b 100644
--- a/server/src/http/middleware/ConfiguredMiddleware.js
+++ b/server/src/http/middleware/ConfiguredMiddleware.ts
@@ -1,6 +1,7 @@
+import { Container } from 'typedi';
+import { Request, Response, NextFunction } from 'express';
 
-// eslint-disable-next-line consistent-return
-export default async (req, res, next) => {
+export default async (req: Request, res: Response, next: NextFunction) => {
   const { Option } = req.models;
   const option = await Option.query().where('key', 'app_configured');
 
diff --git a/server/src/http/middleware/SubscriptionFeatureMiddleware.js b/server/src/http/middleware/SubscriptionFeatureMiddleware.js
deleted file mode 100644
index e69de29bb..000000000
diff --git a/server/src/http/middleware/SubscriptionMiddleware.js b/server/src/http/middleware/SubscriptionMiddleware.js
deleted file mode 100644
index 1f38bc83d..000000000
--- a/server/src/http/middleware/SubscriptionMiddleware.js
+++ /dev/null
@@ -1,26 +0,0 @@
-
-export default (subscriptionSlug = 'main') => async (req, res, next) => {
-  const { tenant } = req;
-
-  if (!tenant) {
-    throw new Error('Should load `TenancyMiddlware` before this middleware.');
-  }
-  const subscription = await tenant
-    .$relatedQuery('subscriptions')
-    .modify('subscriptionBySlug', subscriptionSlug)
-    .first();
-
-  // Validate in case there is no any already subscription.
-  if (!subscription) {
-    return res.status(400).send({
-      errors: [{ type: 'TENANT.HAS.NO.SUBSCRIPTION' }],
-    });
-  }
-  // Validate in case the subscription is inactive.
-  else if (subscription.inactive()) {
-    return res.status(400).send({
-      errors: [{ type: 'ORGANIZATION.SUBSCRIPTION.INACTIVE' }],
-    });
-  }
-  next();
-};
\ No newline at end of file
diff --git a/server/src/http/middleware/SubscriptionMiddleware.ts b/server/src/http/middleware/SubscriptionMiddleware.ts
new file mode 100644
index 000000000..0abde5237
--- /dev/null
+++ b/server/src/http/middleware/SubscriptionMiddleware.ts
@@ -0,0 +1,33 @@
+import { Request, Response, NextFunction } from 'express';
+import { Container } from 'typedi';
+
+export default (subscriptionSlug = 'main') => async (req: Request, res: Response, next: NextFunction) => {
+  const { tenant, tenantId } = req;
+  const Logger = Container.get('logger');
+
+  if (!tenant) {
+    throw new Error('Should load `TenancyMiddlware` before this middleware.');
+  }
+  Logger.info('[subscription_middleware] trying get tenant main subscription.');
+  const subscription = await tenant
+    .$relatedQuery('subscriptions')
+    .modify('subscriptionBySlug', subscriptionSlug)
+    .first();
+
+  // Validate in case there is no any already subscription.
+  if (!subscription) {
+    Logger.info('[subscription_middleware] tenant has no subscription.', { tenantId });
+    return res.boom.badRequest(
+      'Tenant has no subscription.',
+      { errors: [{ type: 'TENANT.HAS.NO.SUBSCRIPTION' }] }
+    );
+  }
+  // Validate in case the subscription is inactive.
+  else if (subscription.inactive()) {
+    Logger.info('[subscription_middleware] tenant main subscription is expired.', { tenantId });
+    return res.boom.badRequest(null, {
+      errors: [{ type: 'ORGANIZATION.SUBSCRIPTION.INACTIVE' }],
+    });
+  }
+  next();
+};
\ No newline at end of file
diff --git a/server/src/http/middleware/TenancyMiddleware.js b/server/src/http/middleware/TenancyMiddleware.ts
similarity index 93%
rename from server/src/http/middleware/TenancyMiddleware.js
rename to server/src/http/middleware/TenancyMiddleware.ts
index be358e7d5..7ecd651bc 100644
--- a/server/src/http/middleware/TenancyMiddleware.js
+++ b/server/src/http/middleware/TenancyMiddleware.ts
@@ -1,8 +1,9 @@
 import { Container } from 'typedi';
+import { Request, Response, NextFunction } from 'express';
 import TenantsManager from '@/system/TenantsManager';
 import tenantModelsLoader from '@/loaders/tenantModels';
 
-export default async (req, res, next) => {
+export default async (req: Request, res: Response, next: NextFunction) => {
   const Logger = Container.get('logger');
   const organizationId = req.headers['organization-id'] || req.query.organization;
 
diff --git a/server/src/http/middleware/asyncMiddleware.js b/server/src/http/middleware/asyncMiddleware.js
deleted file mode 100644
index 713dc1b7f..000000000
--- a/server/src/http/middleware/asyncMiddleware.js
+++ /dev/null
@@ -1,9 +0,0 @@
-const asyncMiddleware = (fn) => (req, res, next) => {
-  Promise.resolve(fn(req, res, next))
-    .catch((error) => {
-      console.log(error);
-      next(error);
-    });
-};
-
-export default asyncMiddleware;
diff --git a/server/src/http/middleware/asyncMiddleware.ts b/server/src/http/middleware/asyncMiddleware.ts
new file mode 100644
index 000000000..a8c0f747b
--- /dev/null
+++ b/server/src/http/middleware/asyncMiddleware.ts
@@ -0,0 +1,17 @@
+import logger from "src/loaders/logger";
+
+import { Request, Response, NextFunction } from 'express';
+import { Container } from 'typedi';
+
+export default (
+  fn: (rq: Request, rs: Response, next?: NextFunction) => {}) =>
+  (req: Request, res: Response, next: NextFunction) => {
+  const Logger = Container.get('logger');
+
+  Promise.resolve(fn(req, res, next))
+    .catch((error) => {
+      console.log(error);
+      Logger.error('[async_middleware] error.', { error });
+      next(error);
+    });
+};
\ No newline at end of file
diff --git a/server/src/http/middleware/jwtAuth.js b/server/src/http/middleware/jwtAuth.ts
similarity index 85%
rename from server/src/http/middleware/jwtAuth.js
rename to server/src/http/middleware/jwtAuth.ts
index 23188e334..c77709c01 100644
--- a/server/src/http/middleware/jwtAuth.js
+++ b/server/src/http/middleware/jwtAuth.ts
@@ -1,8 +1,9 @@
+import { Request, Response, NextFunction } from 'express';
 import { Container } from 'typedi';
 import jwt from 'jsonwebtoken';
 import config from '@/../config/config';
 
-const authMiddleware = (req, res, next) => {
+const authMiddleware = (req: Request, res: Response, next: NextFunction) => {
   const Logger = Container.get('logger');
   const token = req.headers['x-access-token'] || req.query.token;
 
diff --git a/server/src/interfaces/Account.ts b/server/src/interfaces/Account.ts
new file mode 100644
index 000000000..64bfb6749
--- /dev/null
+++ b/server/src/interfaces/Account.ts
@@ -0,0 +1,15 @@
+
+
+export interface IAccountDTO {
+  name: string,
+  code: string,
+  description: string,
+  accountTypeNumber: number,
+};
+
+export interface IAccount {
+  name: string,
+  code: string,
+  description: string,
+  accountTypeNumber: number,
+};
\ No newline at end of file
diff --git a/server/src/interfaces/index.ts b/server/src/interfaces/index.ts
index c8d7a9446..7b0c3355f 100644
--- a/server/src/interfaces/index.ts
+++ b/server/src/interfaces/index.ts
@@ -46,8 +46,15 @@ import {
   IOptionDTO,
   IOptionsDTO,
 } from './Options';
+import {
+  IAccount,
+  IAccountDTO,
+} from './Account';
 
 export {
+  IAccount,
+  IAccountDTO,
+
   IBillPaymentEntry,
   IBillPayment,
   IBillPaymentOTD,
diff --git a/server/src/loaders/express.ts b/server/src/loaders/express.ts
index 254ef6cd8..c7ee429db 100644
--- a/server/src/loaders/express.ts
+++ b/server/src/loaders/express.ts
@@ -1,4 +1,4 @@
-import express from 'express';
+import { json, Request, Response, NextFunction } from 'express';
 import helmet from 'helmet';
 import boom from 'express-boom';
 import errorHandler from 'errorhandler';
@@ -6,6 +6,7 @@ import fileUpload from 'express-fileupload';
 import i18n from 'i18n';
 import routes from '@/http';
 import LoggerMiddleware from '@/http/middleware/LoggerMiddleware';
+import AgendashController from '@/http/controllers/Agendash';
 import config from '@/../config/config';
 
 export default ({ app }) => {
@@ -22,7 +23,7 @@ export default ({ app }) => {
   app.use(boom());
 
   // Parses both json and urlencoded.
-  app.use(express.json());
+  app.use(json());
 
   // Handle multi-media requests.
   app.use(fileUpload({
@@ -38,8 +39,11 @@ export default ({ app }) => {
   // Prefix all application routes.
   app.use(config.api.prefix, routes());
 
+  // Agendash application load.
+  app.use('/agendash', AgendashController.router());
+
   // catch 404 and forward to error handler
-  app.use((req, res, next) => {
+  app.use((req: Request, res: Response, next: NextFunction) => {
     return res.boom.notFound();
   })
 };
\ No newline at end of file
diff --git a/server/src/services/Accounts/AccountsService.ts b/server/src/services/Accounts/AccountsService.ts
index 47d9ef9be..2fbe7e341 100644
--- a/server/src/services/Accounts/AccountsService.ts
+++ b/server/src/services/Accounts/AccountsService.ts
@@ -3,7 +3,6 @@ import TenancyService from '@/services/Tenancy/TenancyService';
 import { ServiceError } from '@/exceptions';
 import { IAccountDTO, IAccount } from '@/interfaces';
 import { difference } from 'lodash';
-import { tenant } from 'config/config';
 
 @Service()
 export default class AccountsService {
@@ -137,6 +136,7 @@ export default class AccountsService {
   public async newAccount(tenantId: number, accountDTO: IAccountDTO) {
     const { Account } = this.tenancy.models(tenantId);
 
+    // Validate the account code uniquiness.
     if (accountDTO.code) {
       await this.isAccountCodeUniqueOrThrowError(tenantId, accountDTO.code);
     }
diff --git a/server/src/services/Authentication/index.ts b/server/src/services/Authentication/index.ts
index 461aa46c5..ae94d3f11 100644
--- a/server/src/services/Authentication/index.ts
+++ b/server/src/services/Authentication/index.ts
@@ -126,7 +126,7 @@ export default class AuthenticationService {
     this.logger.info('[register] Someone trying to register.');
     await this.validateEmailAndPhoneUniqiness(registerDTO);
 
-    this.logger.info('[register] Creating a new tenant org.')
+    this.logger.info('[register] Creating a new tenant organization.')
     const tenant = await this.newTenantOrganization();
 
     this.logger.info('[register] Trying hashing the password.')
diff --git a/server/src/services/Users/UsersService.ts b/server/src/services/Users/UsersService.ts
index 88d694e7b..56a4541c5 100644
--- a/server/src/services/Users/UsersService.ts
+++ b/server/src/services/Users/UsersService.ts
@@ -3,7 +3,6 @@ import TenancyService from '@/services/Tenancy/TenancyService';
 import { SystemUser } from "@/system/models";
 import { ServiceError, ServiceErrors } from "@/exceptions";
 import { ISystemUser, ISystemUserDTO } from "@/interfaces";
-import { ISystemUser } from "src/interfaces";
 
 @Service()
 export default class UsersService {
@@ -20,9 +19,9 @@ export default class UsersService {
   async editUser(tenantId: number, userId: number, userDTO: ISystemUserDTO): Promise<ISystemUser> {
     const foundUsers = await SystemUser.query()
       .whereNot('id', userId)
-      .andWhere((q) => {
-        q.where('email', userDTO.email);
-        q.orWhere('phone_number', userDTO.phoneNumber);
+      .andWhere((query) => {
+        query.where('email', userDTO.email);
+        query.orWhere('phone_number', userDTO.phoneNumber);
       })
       .where('tenant_id', tenantId);