auth template

package.json

@@ -20,17 +20,26 @@
     "test:e2e": "jest --config ./test/jest-e2e.json"
   },
   "dependencies": {
+    "@nestjs-modules/mailer": "^2.0.2",
     "@nestjs/common": "^11.0.1",
     "@nestjs/config": "^4.0.2",
     "@nestjs/core": "^11.0.1",
+    "@nestjs/jwt": "^11.0.0",
+    "@nestjs/passport": "^11.0.5",
     "@nestjs/platform-express": "^11.0.1",
     "@nestjs/swagger": "^11.0.6",
     "@nestjs/typeorm": "^11.0.0",
+    "axios": "^1.10.0",
     "class-transformer": "^0.5.1",
     "class-validator": "^0.14.1",
+    "jsonwebtoken": "^9.0.2",
+    "jwk-to-pem": "^2.0.7",
     "mssql": "^10.0.4",
     "mysql2": "^3.12.0",
+    "nodemailer": "^7.0.3",
     "oracledb": "^6.7.2",
+    "passport": "^0.7.0",
+    "passport-jwt": "^4.0.1",
     "pg": "^8.13.3",
     "reflect-metadata": "^0.2.2",
     "rxjs": "^7.8.1",
@@ -46,6 +55,7 @@
     "@swc/core": "^1.10.7",
     "@types/express": "^5.0.0",
     "@types/jest": "^29.5.14",
+    "@types/jwk-to-pem": "^2.0.3",
     "@types/mssql": "^9.1.7",
     "@types/node": "^22.10.7",
     "@types/oracledb": "^6.5.4",

src/app.module.ts

@@ -2,15 +2,15 @@ import { MiddlewareConsumer, Module } from '@nestjs/common';
 import { DbModule } from './db/db.module';
 import { OracleModule } from './oracle/oracle.module';
 import { AuthModule } from './auth/auth.module';
-import { MssqlModule } from './mssql/mssql.module';
 import { OriginCheckMiddleware } from './middleware/OriginCheck.middleware';
 import { ReqBodyKeysToUppercaseMiddleware } from './middleware/reqBodyKeysToUppercase.middleware';
 import { ConfigModule } from '@nestjs/config';
+import { MailModule } from './mail/mail.module';
 
 @Module({
   imports: [
     ConfigModule.forRoot({ isGlobal: true }),
-    AuthModule, DbModule, OracleModule
+    AuthModule, DbModule, OracleModule, MailModule
   ],
   controllers: [],
   providers: [],

src/auth/auth.controller.ts

@@ -1,15 +1,93 @@
-import { Body, Controller, Post } from '@nestjs/common';
+import { Body, Controller, Get, HttpCode, Post, Put, Req, Res } from '@nestjs/common';
 import { AuthService } from './auth.service';
 import { ApiTags } from '@nestjs/swagger';
 import { AuthLoginDTO } from './auth.dto';
+import { Request, Response } from 'express';
 
 @Controller()
 export class AuthController {
-  constructor(private readonly authService: AuthService) {}
+  constructor(private readonly authService: AuthService) { }
 
   @ApiTags('Auth')
   @Post('/login')
   login(@Body() body: AuthLoginDTO) {
     return this.authService.login(body);
   }
+
+  @Post('login-client')
+  @HttpCode(200)
+  async loginClient(@Body() body: AuthLoginDTO, @Res({ passthrough: true }) res: Response, @Req() req: Request) {
+    let k: any = await this.authService.loginUser(body.P_EMAILADDR, body.P_PASSWORD, req);
+
+    if (k.access_token) {
+      res.cookie('access_token', k.access_token, {
+        httpOnly: true,
+        secure: false,        // set to true if you're on HTTPS
+        sameSite: 'lax',  // adjust based on your needs (strict, lax , none)
+        maxAge: 90 * 1000, // convert seconds to ms if applicable
+      });
+    }
+
+    if (k.refresh_token) {
+      res.cookie('refresh_token', k.refresh_token, {
+        httpOnly: true,
+        secure: false,        // set to true if you're on HTTPS
+        sameSite: 'lax',  // adjust based on your needs (strict, lax , none)
+        maxAge: 90 * 1000, // convert seconds to ms if applicable
+      });
+    }
+
+    return { statusCode: 200, message: "Logged-In Successfully", email: k.email }
+  }
+
+  // @UseGuards(RegisterGuard)
+  @Post('register-client')
+  async register(@Body() body: AuthLoginDTO, @Req() req: Request) {
+    return this.authService.registerUser(body, req);
+  }
+
+  // @UseInterceptors(LogoutInterceptor)
+  @HttpCode(200)
+  @Post('logout-client')
+  async logout(@Req() req: any, @Res() res: Response) {
+    const refreshToken = req.user?.refreshToken;
+    let rst: any = await this.authService.logoutUser(refreshToken);
+    if (rst.statusCode === 200) {
+      res.clearCookie('access_token');
+      res.clearCookie('refresh_token');
+    }
+    res.json({ ...rst })
+  }
+
+  @Put('forgot-password-client')
+  async forgotPassword() {
+    return this.authService.forgotPassword();
+  }
+
+  @Get('refresh-client-tokens')
+  async getTokenFromRefreshToken(@Req() req: Request, @Res({ passthrough: true }) res: Response) {
+    let k: any = await this.authService.getTokenFromRefreshToken(req)
+
+    if (k.access_token) {
+      res.cookie('access_token', k.access_token, {
+        httpOnly: true,
+        secure: false,        // set to true if you're on HTTPS
+        sameSite: 'lax',  // adjust based on your needs (strict, lax , none)
+        maxAge: 90 * 1000, // convert seconds to ms if applicable
+        path: '/'
+      });
+    }
+
+    if (k.refresh_token) {
+      res.cookie('refresh_token', k.refresh_token, {
+        httpOnly: true,
+        secure: false,        // set to true if you're on HTTPS
+        sameSite: 'lax',  // adjust based on your needs (strict, lax , none)
+        maxAge: 90 * 1000, // convert seconds to ms if applicable
+        path: '/'
+      });
+    }
+
+    return { statusCode: 200, message: "Tokens refreshed successfully" }
+  }
 }

src/auth/auth.dto.ts

@@ -9,4 +9,4 @@ export class AuthLoginDTO {
   @ApiProperty({ required: true })
   @IsString()
   P_PASSWORD: string;
-}
+}

src/auth/auth.service.ts

@@ -1,11 +1,23 @@
-import { BadRequestException, Injectable } from '@nestjs/common';
+import { BadRequestException, Injectable, InternalServerErrorException } from '@nestjs/common';
 import { OracleDBService } from 'src/db/db.service';
 import { AuthLoginDTO } from './auth.dto';
 import * as oracledb from 'oracledb';
+import { ConfigService } from '@nestjs/config';
+import axios, { AxiosRequestConfig, AxiosResponse } from 'axios';
+import { Request } from 'express';
+import * as jwkToPem from "jwk-to-pem"
+import * as jwt from "jsonwebtoken"
+import { UnauthorizedException } from 'src/exceptions/unauthorized.exception';
+import { ConflictException } from 'src/exceptions/conflict.exception';
 
 @Injectable()
 export class AuthService {
-  constructor(private readonly oracleDBService: OracleDBService) { }
+  private keyCache: Record<string, string> = {};
+
+  constructor(
+    private readonly oracleDBService: OracleDBService,
+    private readonly configService: ConfigService,
+  ) { }
 
   async login(body: AuthLoginDTO) {
     let connection;
@@ -72,4 +84,375 @@ export class AuthService {
       }
     }
   }
+
+  private async getPublicKey(kid: string): Promise<string> {
+    if (this.keyCache[kid]) return this.keyCache[kid];
+
+    const jwksUri = `${this.configService.get('KEYCLOAK_URL')}/realms/${this.configService.get(
+      'REALM',
+    )}/protocol/openid-connect/certs`;
+
+    const { data } = await axios.get(jwksUri);
+    const key = data.keys.find((k) => k.kid === kid);
+    if (!key) throw new InternalServerErrorException('Key not found');
+
+    const pem = jwkToPem(key);
+    this.keyCache[kid] = pem;
+    return pem;
+  }
+
+  async introspectToken(token: string): Promise<any> {
+    const url = `${this.configService.get('KEYCLOAK_URL')}/realms/${this.configService.get(
+      'REALM',
+    )}/protocol/openid-connect/token/introspect`;
+
+    const params = new URLSearchParams();
+    params.append('token', token);
+    params.append('client_id', this.configService.get('CLIENT_ID') || '');
+    params.append('client_secret', this.configService.get('CLIENT_SECRET') || '');
+
+
+    const response = await axios.post(url, params, {
+      headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
+    });
+
+    return response.data;
+  }
+
+  async decodeToken(token: string): Promise<any> {
+    const decodedHeader = jwt.decode(token, { complete: true });
+    if (!decodedHeader || typeof decodedHeader !== 'object') {
+      throw new Error('Invalid token format');
+    }
+
+    const kid: any = decodedHeader.header.kid;
+    const publicKey = await this.getPublicKey(kid);
+
+    const introspection = await this.introspectToken(token);
+
+    console.log('introspec : ', introspection);
+
+    if (!introspection.active) {
+      throw new Error('Unauthorized');
+    }
+
+    const verified = jwt.verify(token, publicKey, { algorithms: ['RS256'] });
+    return verified;
+  }
+
+  async getAdminAccessTokenx(): Promise<string> {
+    const data = new URLSearchParams();
+    data.append('grant_type', 'client_credentials');
+    data.append('client_id', this.configService.get('CLIENT_ID') || '');
+    data.append('client_secret', this.configService.get('CLIENT_SECRET') || '');
+    let KEYCLOAK_URL = await this.configService.get('KEYCLOAK_URL');
+    try {
+      const response: AxiosResponse = await axios.post(KEYCLOAK_URL, data, {
+        headers: {
+          'Content-Type': 'application/x-www-form-urlencoded',
+        },
+      });
+      return response.data.access_token;
+    } catch (error) {
+      console.error('Error getting Keycloak access token:', error.response ? error.response.data : error.message);
+      throw new Error('Failed to obtain Keycloak access token');
+    }
+  }
+
+  async loginUser(username: string, password: string, req: Request): Promise<any> {
+
+    console.log(username, password);
+
+
+    const accessToken = req.cookies['access_token'];
+    const refreshToken = req.cookies['refresh_token'];
+
+    console.log("---------cookies--------------");
+    console.log(accessToken, refreshToken);
+
+    // return {accessToken, refreshToken, expires_in:2000}
+
+    if (!accessToken && !refreshToken) {
+
+      console.log("I am here getting token ....");
+
+      const url = `${this.configService.get('KEYCLOAK_URL')}/realms/${this.configService.get('REALM')}/protocol/openid-connect/token`;
+
+      const params = new URLSearchParams();
+      params.append('grant_type', 'password');
+      params.append('client_id', this.configService.get('CLIENT_ID') || '');
+      params.append('client_secret', this.configService.get('CLIENT_SECRET') || '');
+      params.append('username', username);
+      params.append('password', password);
+
+      try {
+        const response = await axios.post(url, params, {
+          headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
+        });
+        console.log('first time data ...');
+
+        let k = { ...response.data, email: username };
+
+        return k; // tokens and user info
+      } catch (error) {
+        console.log(error.message);
+
+        throw new BadRequestException('Invalid username or password');
+      }
+    }
+
+    else if (accessToken && refreshToken) {
+      return { access_token: accessToken, refresh_token: refreshToken, email: username }
+    }
+  }
+
+  async getUserIdByEmail() {
+
+    let url = `${this.configService.get('KEYCLOAK_URL')}/admin/realms/${this.configService.get('REALM')}/users?email=a@gmail.com`;
+
+    let adminAccessToken = await this.getAdminAccessToken();
+
+    const options: AxiosRequestConfig = {
+      method: 'GET',
+      url,
+      headers: {
+        Authorization: `Bearer ${adminAccessToken}`,
+        "Content-Type": "application/json"
+      }
+    };
+
+    try {
+      const { data } = await axios.request(options);
+      return data[0]?.id;
+    } catch (error) {
+      // console.error(error);
+      console.log(error.message);
+    }
+  }
+
+  async forgotPassword() {
+    let urlx = `${this.configService.get('KEYCLOAK_URL')}/admin/realms/${this.configService.get('REALM')}/users`;
+    let urlxx = `${this.configService.get('KEYCLOAK_URL')}/admin/realms/${this.configService.get('REALM')}/users?email=${encodeURIComponent('a@gmail.com')}`;
+    let url = `${this.configService.get('KEYCLOAK_URL')}/admin/realms/${this.configService.get('REALM')}/users?email=a@gmail.com`;
+
+    let validatePasswordURL = `${this.configService.get('KEYCLOAK_URL')}/realms/${this.configService.get('REALM')}/protocol/openid-connect/token`
+
+    const validatePasswordURLSearchParams = new URLSearchParams({
+      grant_type: 'password',
+      client_id: `${this.configService.get('CLIENT_ID')}`,
+      client_secret: `${this.configService.get('CLIENT_SECRET')}`,
+      username: `${'a@gmail.com'}`,
+      password: `${'A1!bcdef'}`,
+    });
+
+    let userID = await this.getUserIdByEmail();
+
+    console.log("userID: ", userID);
+
+    let resetPasswordURL = `${this.configService.get('KEYCLOAK_URL')}/admin/realms/${this.configService.get('REALM')}/users/${userID}/reset-password`;
+
+    let adminAccessToken = await this.getAdminAccessToken();
+
+    const options: AxiosRequestConfig = {
+      method: 'GET',
+      url,
+      headers: {
+        Authorization: `Bearer ${adminAccessToken}`,
+        "Content-Type": "application/json"
+      }
+    };
+
+    const options1: AxiosRequestConfig = {
+      method: 'PUT',
+      url: resetPasswordURL,
+      headers: {
+        Authorization: `Bearer ${adminAccessToken}`
+      },
+      data: {
+        type: 'password',
+        value: 'A1!bcdef',
+        temporary: false,
+      }
+    };
+
+    const options2: AxiosRequestConfig = {
+      method: 'POST',
+      url: validatePasswordURL,
+      headers: {
+        'Content-Type': 'application/x-www-form-urlencoded',
+      },
+      data: validatePasswordURLSearchParams
+    };
+
+    try {
+      const { data } = await axios.request(options2);
+      return { statusCode: 200, message: 'password reset successfull' }
+    } catch (error) {
+      // console.error(error);
+      console.log(error.message);
+
+      throw new InternalServerErrorException()
+
+    }
+  }
+
+  async getAdminAccessToken() {
+    try {
+      const adminTokenUrl = `${this.configService.get('KEYCLOAK_URL')}/realms/${this.configService.get('REALM')}/protocol/openid-connect/token`;
+
+      console.log(adminTokenUrl);
+
+      const adminParams = new URLSearchParams();
+      adminParams.append('grant_type', 'client_credentials');
+      adminParams.append('client_id', this.configService.get('CLIENT_ID') || '');
+      adminParams.append('client_secret', this.configService.get('CLIENT_SECRET') || '');
+
+      const adminTokenResponse = await axios.post(adminTokenUrl,
+        adminParams,
+        {
+          headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
+        });
+      console.log(adminTokenResponse.data);
+
+      const adminAccessToken = adminTokenResponse.data.access_token;
+
+      return adminAccessToken;
+    } catch (error) {
+      console.log(error.message);
+      throw error
+    }
+  }
+
+  async registerUser(body: AuthLoginDTO, req: Request) {
+    // First, get an admin access token using client credentials
+    let det = await req['user'];
+
+    if (det?.email !== body.P_EMAILADDR) {
+      throw new BadRequestException();
+    }
+
+    const adminTokenUrl = `${this.configService.get('KEYCLOAK_URL')}/realms/${this.configService.get('REALM')}/protocol/openid-connect/token`;
+
+    console.log(adminTokenUrl);
+
+    const adminParams = new URLSearchParams();
+    adminParams.append('grant_type', 'client_credentials');
+    adminParams.append('client_id', this.configService.get('CLIENT_ID') || '');
+    adminParams.append('client_secret', this.configService.get('CLIENT_SECRET') || '');
+
+    const adminTokenResponse = await axios.post(adminTokenUrl,
+      adminParams,
+      {
+        headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
+      });
+    console.log(adminTokenResponse.data);
+
+    // const adminAccessToken = adminTokenResponse.data.access_token;
+    const adminAccessToken = adminTokenResponse.data.access_token;
+
+    // Now create user
+    const createUserUrl = `${this.configService.get('KEYCLOAK_URL')}/admin/realms/${this.configService.get('REALM')}/users`;
+
+    const userPayload = {
+      username: body.P_EMAILADDR,
+      // firstName:"A",
+      // lastName:"B",
+      email: body.P_EMAILADDR,
+      emailVerified: true,
+      enabled: true,
+      credentials: [
+        {
+          type: 'password',
+          value: body.P_PASSWORD,
+          temporary: false,
+        },
+      ],
+    };
+
+    console.log(userPayload);
+
+
+    try {
+      const response = await axios.post(createUserUrl, userPayload, {
+        headers: {
+          Authorization: `Bearer ${adminAccessToken}`,
+          'Content-Type': 'application/json',
+        },
+      });
+
+      if (response.status === 201) {
+        return { message: 'User created successfully' };
+      }
+
+    } catch (error) {
+      // handle errors like user exists, validation errors, etc.
+      console.log(error.message);
+
+      if (error.message === "Request failed with status code 409") {
+        throw new ConflictException("User already exist");
+      }
+
+      throw new InternalServerErrorException('Failed to create user');
+    }
+  }
+
+  async logoutUser(refreshToken: string): Promise<any> {
+    const url = `${this.configService.get('KEYCLOAK_URL')}/realms/${this.configService.get('REALM')}/protocol/openid-connect/logout`;
+
+    const params = new URLSearchParams();
+    params.append('client_id', this.configService.get('CLIENT_ID') || '');
+    params.append('client_secret', this.configService.get('CLIENT_SECRET') || '');
+    params.append('refresh_token', refreshToken);
+
+    try {
+      const response = await axios.post(url, params, {
+        headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
+      });
+      return { statusCode: 200, message: 'Logged-Out successfully' };
+    } catch (error) {
+      throw new UnauthorizedException('Logout failed');
+    }
+  }
+
+  async getTokenFromRefreshToken(req: Request) {
+    const refreshToken = req.cookies['refresh_token'];
+
+    if (!refreshToken) {
+      throw new UnauthorizedException('Authentication failed');
+    }
+
+    let dk = await this.introspectToken(refreshToken);
+
+    console.log('--------------validation------------------------');
+    console.log(dk);
+
+    console.log('--------------validation------------------------');
+
+    const url = `${this.configService.get('KEYCLOAK_URL')}/realms/${this.configService.get('REALM')}/protocol/openid-connect/token`;
+
+    const params = new URLSearchParams();
+    params.append('grant_type', 'refresh_token');
+    params.append('client_id', this.configService.get('CLIENT_ID') || '');
+    params.append('client_secret', this.configService.get('CLIENT_SECRET') || '');
+    params.append('refresh_token', refreshToken);
+
+    try {
+      const response = await axios.post(url, params, {
+        headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
+      });
+
+      console.log('refresh token response...');
+      console.log(response.data);
+
+      return response.data; // tokens and user info
+
+      // console.log(response.data);
+
+      // return { message: "tokens refreshed successfully...." }
+
+    } catch (error) {
+      console.log(error.message);
+      throw new UnauthorizedException('Authentication failed');
+    }
+  }
 }

src/exceptions/conflict.exception.ts

@@ -0,0 +1,19 @@
+import { HttpException, HttpStatus } from '@nestjs/common';
+
+export class ConflictException extends HttpException {
+    constructor(
+        message = 'CONFLICT',
+        errorCode = 'INTERNAL_ERROR',
+        data: any = null,
+    ) {
+        super(
+            {
+                statusCode: HttpStatus.CONFLICT,
+                message,
+                // errorCode,
+                // data,
+            },
+            HttpStatus.CONFLICT,
+        );
+    }
+}

src/exceptions/unauthorized.exception.ts

@@ -0,0 +1,19 @@
+import { HttpException, HttpStatus } from '@nestjs/common';
+
+export class UnauthorizedException extends HttpException {
+    constructor(
+        message = 'Unauthorized',
+        errorCode = 'INTERNAL_ERROR',
+        data: any = null,
+    ) {
+        super(
+            {
+                statusCode: HttpStatus.UNAUTHORIZED,
+                message,
+                // errorCode,
+                // data,
+            },
+            HttpStatus.UNAUTHORIZED,
+        );
+    }
+}

src/guards/jwt-auth.guard.ts

@@ -0,0 +1,46 @@
+import {
+  Injectable,
+  CanActivate,
+  ExecutionContext,
+  UnauthorizedException,
+  Global,
+} from '@nestjs/common';
+import { AuthService } from 'src/auth/auth.service';
+
+@Global()
+@Injectable()
+export class JwtAuthGuard implements CanActivate {
+  constructor(private readonly authService: AuthService) {}
+
+  async canActivate(context: ExecutionContext): Promise<boolean> {
+    const request = context.switchToHttp().getRequest();
+
+    // Read token from cookie
+    console.log('------------------------------');
+    let g = await request.cookies
+    console.log("g : ",g);
+    console.log(' guard cookies ------------------------------');
+    
+    const token = request.cookies?.access_token;
+
+    if (!token) {
+      console.log('error from inspect token .....');
+      
+      throw new UnauthorizedException('Authentication failed');
+    }
+
+    try {
+      const decoded = await this.authService.decodeToken(token);
+      request.user = decoded;
+      return true;
+    } catch (err) {
+      console.log(err.message);
+
+      throw new UnauthorizedException({
+        message: 'Invalid Token',
+        error: 'Unauthorized',
+        statusCode: 401,
+      });
+    }
+  }
+}

src/guards/register.guard.ts

@@ -0,0 +1,53 @@
+// jwt-auth.guard.ts
+import {
+  CanActivate,
+  ExecutionContext,
+  Injectable,
+  UnauthorizedException,
+} from '@nestjs/common';
+import { JwtService } from '@nestjs/jwt';
+import { Request } from 'express';
+
+@Injectable()
+export class RegisterGuard implements CanActivate {
+  constructor(private readonly jwtService: JwtService) {}
+
+  canActivate(context: ExecutionContext): boolean {
+    const request = context.switchToHttp().getRequest<Request>();
+    const authHeader = request.headers['authorization'];
+
+    if (!authHeader || !authHeader.startsWith('Bearer ')) {
+      throw new UnauthorizedException('Authorization header missing or malformed');
+    }
+
+    const token = authHeader.split(' ')[1];
+
+    try {
+      // Decode without verifying to check expiry
+      const decoded: any = this.jwtService.decode(token);
+
+      console.log(decoded);
+      
+
+      if (!decoded || !decoded.exp) {
+        throw new UnauthorizedException('Invalid token payload');
+      }
+
+      // Check expiration (exp is in seconds, Date.now() in ms)
+      const now = Math.floor(Date.now() / 1000);
+      if (decoded.exp < now) {
+        throw new UnauthorizedException('Token expired');
+      }
+
+      // Verify the token (checks signature and expiration again)
+      this.jwtService.verify(token, {secret:'yourSecretKey'});
+
+      // Optionally attach user info to request object for further use
+      request['user'] = decoded;
+
+      return true;
+    } catch (err) {
+      throw new UnauthorizedException('Invalid or expired token');
+    }
+  }
+}

src/interceptors/logout.interceptor.ts

@@ -0,0 +1,30 @@
+// refresh-token.interceptor.ts
+import {
+  Injectable,
+  NestInterceptor,
+  ExecutionContext,
+  CallHandler,
+  BadRequestException,
+} from '@nestjs/common';
+import { Observable } from 'rxjs';
+
+@Injectable()
+export class LogoutInterceptor implements NestInterceptor {
+  intercept(context: ExecutionContext, next: CallHandler): Observable<any> {
+    const request = context.switchToHttp().getRequest();
+
+    const refreshToken = request.cookies?.refresh_token;
+
+    if (!refreshToken) {
+      throw new BadRequestException('Refresh token not found in cookies');
+    }
+
+    // Attach refresh token to request object for later use
+    request.user = {
+      ...(request.user || {}),
+      refreshToken,
+    };
+
+    return next.handle();
+  }
+}

src/mail/mail.module.ts

@@ -0,0 +1,18 @@
+import { MailerModule } from '@nestjs-modules/mailer';
+import { Module } from '@nestjs/common';
+
+@Module({
+    imports: [
+        MailerModule.forRoot({
+            transport: {
+                host: 'localhost',
+                port: 1025,
+                ignoreTLS: true,
+            },
+            defaults: {
+                from: '"No Reply" <no-reply@example.com>',
+            },
+        }),
+    ],
+})
+export class MailModule { }