diff --git a/src/app.controller.spec.ts b/src/app.controller.spec.ts
deleted file mode 100644
index d22f389..0000000
--- a/src/app.controller.spec.ts
+++ /dev/null
@@ -1,22 +0,0 @@
-import { Test, TestingModule } from '@nestjs/testing';
-import { AppController } from './app.controller';
-import { AppService } from './app.service';
-
-describe('AppController', () => {
-  let appController: AppController;
-
-  beforeEach(async () => {
-    const app: TestingModule = await Test.createTestingModule({
-      controllers: [AppController],
-      providers: [AppService],
-    }).compile();
-
-    appController = app.get<AppController>(AppController);
-  });
-
-  describe('root', () => {
-    it('should return "Hello World!"', () => {
-      expect(appController.getHello()).toBe('Hello World!');
-    });
-  });
-});
diff --git a/src/app.controller.ts b/src/app.controller.ts
deleted file mode 100644
index cce879e..0000000
--- a/src/app.controller.ts
+++ /dev/null
@@ -1,12 +0,0 @@
-import { Controller, Get } from '@nestjs/common';
-import { AppService } from './app.service';
-
-@Controller()
-export class AppController {
-  constructor(private readonly appService: AppService) {}
-
-  @Get()
-  getHello(): string {
-    return this.appService.getHello();
-  }
-}
diff --git a/src/app.module.ts b/src/app.module.ts
index 30c8b66..e5a8b82 100644
--- a/src/app.module.ts
+++ b/src/app.module.ts
@@ -1,6 +1,4 @@
 import { Module } from '@nestjs/common';
-import { AppController } from './app.controller';
-import { AppService } from './app.service';
 import { TypeOrmModule } from '@nestjs/typeorm';
 import { ConfigModule, ConfigService } from '@nestjs/config';
 import Joi from 'joi';
@@ -17,7 +15,5 @@ import { databaseConfig } from './config/typeorm.config';
     TypeOrmModule.forRootAsync(databaseConfig()),
     UsersModule
   ],
-  controllers: [AppController],
-  providers: [AppService],
 })
 export class AppModule {}
diff --git a/src/app.service.ts b/src/app.service.ts
deleted file mode 100644
index 927d7cc..0000000
--- a/src/app.service.ts
+++ /dev/null
@@ -1,8 +0,0 @@
-import { Injectable } from '@nestjs/common';
-
-@Injectable()
-export class AppService {
-  getHello(): string {
-    return 'Hello World!';
-  }
-}
diff --git a/src/config/config.validation.ts b/src/config/config.validation.ts
index 5be941b..ffb022c 100644
--- a/src/config/config.validation.ts
+++ b/src/config/config.validation.ts
@@ -1,6 +1,8 @@
 import * as Joi from 'joi';
 
 export const validationSchema = Joi.object({
+  APP_PORT: Joi.number().required(),
+
   DB_HOST: Joi.string().required(),
   DB_PORT: Joi.number().required(),
   DB_USER: Joi.string().required(),
diff --git a/src/main.ts b/src/main.ts
index 3df971c..633b475 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,27 +1,33 @@
 import { NestFactory, Reflector } from '@nestjs/core';
 import { AppModule } from './app.module';
-import { ClassSerializerInterceptor, ValidationPipe } from '@nestjs/common';
+import { ClassSerializerInterceptor, Logger, ValidationPipe } from '@nestjs/common';
 import { setupSwagger } from './config/swagger.config';
+import { ConfigService } from '@nestjs/config';
 
 async function bootstrap() {
+  const logger = new Logger('APP');
+  
   const app = await NestFactory.create(AppModule);
 
   app.useGlobalPipes(
-    new ValidationPipe(
-      {
-        whitelist: true,
-        forbidNonWhitelisted: true,
-        transform: true
-      }
-    )
+    new ValidationPipe({
+      whitelist: true,
+      forbidNonWhitelisted: true,
+      transform: true,
+    }),
   );
 
-  app.useGlobalInterceptors(
-    new ClassSerializerInterceptor(app.get(Reflector))
-  );
+  app.useGlobalInterceptors(new ClassSerializerInterceptor(app.get(Reflector)));
 
   setupSwagger(app);
 
-  await app.listen(process.env.PORT ?? 3000);
+  const configService = app.get<ConfigService>(ConfigService);
+
+
+  const PORT = configService.getOrThrow<number>('APP_PORT');
+  await app.listen(PORT, '0.0.0.0', () => {
+    logger.log(`Server running at http://localhost:${PORT}`);
+    logger.log(`Swagger is serving at http://localhost:${PORT}/api-docs`);
+  });
 }
 bootstrap();
diff --git a/src/users/DTO/create-user.dto.ts b/src/users/DTO/create-user.dto.ts
index bdc1a18..763e8c5 100644
--- a/src/users/DTO/create-user.dto.ts
+++ b/src/users/DTO/create-user.dto.ts
@@ -22,7 +22,6 @@ export class CreateUserDto {
   lastName: string;
 
   @ApiProperty({ example: 'mahdirafie@gmail.com' })
-  @MaxLength(20)
   @IsEmail()
   @MaxLength(100)
   email: string;
@@ -36,6 +35,5 @@ export class CreateUserDto {
   @ApiProperty({ example: 'MahdiPassword@5!' })
   @IsString()
   @MinLength(8)
-  @Exclude()
   password: string;
 }
diff --git a/src/users/controllers/users.controller.ts b/src/users/controllers/users.controller.ts
index d24f5d4..c64425b 100644
--- a/src/users/controllers/users.controller.ts
+++ b/src/users/controllers/users.controller.ts
@@ -1,6 +1,21 @@
-import { Controller } from '@nestjs/common';
+import { Body, Controller, Get, Post } from '@nestjs/common';
+import { ApiOperation, ApiResponse } from '@nestjs/swagger';
+import { CreateUserDto } from '../DTO/create-user.dto';
+import { User } from '../entities/user.entity';
+import { UsersService } from '../providers/users.service';
 
 @Controller('users')
 export class UsersController {
-    
+
+    constructor(
+        private readonly userService: UsersService
+    ) {}
+
+    @Post('signup')
+    @ApiOperation({summary: 'Create a new user!'})
+    @ApiResponse({status: 201, description: 'User created successfully!'})
+    @ApiResponse({status: 400, description: 'Bad Request from User!'})
+    signupUser(@Body() body: CreateUserDto): Promise<User> {
+        return this.userService.signupUser(body);
+    }
 }
diff --git a/src/users/entities/user.entity.ts b/src/users/entities/user.entity.ts
index fd79773..9e7189d 100644
--- a/src/users/entities/user.entity.ts
+++ b/src/users/entities/user.entity.ts
@@ -1,5 +1,6 @@
 import { Entity, Column } from "typeorm";
 import { BaseEntity } from "src/common/entities/base.entity";
+import { Exclude } from "class-transformer";
 
 @Entity('users')
 export class User extends BaseEntity {
@@ -18,6 +19,7 @@ export class User extends BaseEntity {
     @Column({
         select: false
     })
+    @Exclude()
     password: string;
 
     @Column({
@@ -25,5 +27,6 @@ export class User extends BaseEntity {
         nullable: true,
         select: false
     })
+    @Exclude()
     refreshToken: string;
 }
\ No newline at end of file