✨ feat: UserRepository loginUser 메소드 구현(#4)

BE/src/auth/user.repository.ts

@@ -1,4 +1,4 @@
-import { Injectable } from '@nestjs/common';
+import { Injectable, UnauthorizedException } from '@nestjs/common';
 import { InjectDataSource } from '@nestjs/typeorm';
 import { DataSource, Repository } from 'typeorm';
 import * as bcrypt from 'bcrypt';
@@ -18,4 +18,14 @@ export class UserRepository extends Repository<User> {
     const user = this.create({ email, password: hashedPassword });
     await this.save(user);
   }
+
+  async loginUser(authCredentialsDto: AuthCredentialsDto) {
+    const { email, password } = authCredentialsDto;
+    const user = await this.findOne({ where: { email } });
+    if (user && (await bcrypt.compare(password, user.password))) {
+      return 'Login successful';
+    }
+
+    throw new UnauthorizedException('Login failed');
+  }
 }