add sigin and sign up

src/auth/auth.controller.ts

@@ -8,6 +8,10 @@ export class AuthController {
 
   @Post('/signup')
   signup(@Body() authCredentialDto: AuthCredentialDto): Promise<void> {
-    return this.authService.signup(authCredentialDto);
+    return this.authService.signUp(authCredentialDto);
+  }
+  @Post('/signin')
+  signIn(@Body() authCredentialDto: AuthCredentialDto): Promise<string> {
+    return this.authService.sigIn(authCredentialDto);
   }
 }

src/auth/auth.service.ts

@@ -1,7 +1,8 @@
-import { Injectable } from '@nestjs/common';
+import { Injectable, UnauthorizedException } from '@nestjs/common';
 import { InjectRepository } from '@nestjs/typeorm';
 import { AuthCredentialDto } from 'src/auth/dto/auth-credentials.dto';
 import { UsersRepository } from 'src/auth/users.repository';
+import * as bcrypt from 'bcrypt';
 
 @Injectable()
 export class AuthService {
@@ -10,7 +11,17 @@ export class AuthService {
     private usersRepository: UsersRepository,
   ) {}
 
-  async signup(authCredentialDto: AuthCredentialDto): Promise<void> {
+  async signUp(authCredentialDto: AuthCredentialDto): Promise<void> {
     return await this.usersRepository.createUser(authCredentialDto);
   }
+
+  async sigIn(authCredentialDto: AuthCredentialDto): Promise<string> {
+    const { password, username } = authCredentialDto;
+    const user = await this.usersRepository.findOne({ username });
+    if (user && (await bcrypt.compare(password, user.password))) {
+      return 'success';
+    } else {
+      throw new UnauthorizedException('please check your credential ');
+    }
+  }
 }

src/auth/users.repository.ts

@@ -5,12 +5,16 @@ import {
 import { AuthCredentialDto } from 'src/auth/dto/auth-credentials.dto';
 import { User } from 'src/auth/user.entity';
 import { EntityRepository, Repository } from 'typeorm';
+import * as bcrypt from 'bcrypt';
 
 @EntityRepository(User)
 export class UsersRepository extends Repository<User> {
   async createUser(authCredentialDto: AuthCredentialDto): Promise<void> {
     const { username, password } = authCredentialDto;
-    const user = this.create({ username, password });
+    const salt = await bcrypt.genSalt();
+    const hashedPassword = await bcrypt.hash(password, salt);
+    const user = this.create({ username, password: hashedPassword });
+
     try {
       await this.save(user);
     } catch (error) {