diff --git a/backend/package.json b/backend/package.json
index c4ac202..0fc0d1f 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -30,6 +30,7 @@
     "@nestjs/passport": "^10.0.3",
     "@nestjs/platform-express": "^10.0.0",
     "@nestjs/swagger": "^7.4.0",
+    "bcrypt": "^5.1.1",
     "class-transformer": "^0.5.1",
     "class-validator": "^0.14.1",
     "mongoose": "^8.5.4",
@@ -41,6 +42,7 @@
     "@nestjs/cli": "^10.0.0",
     "@nestjs/schematics": "^10.0.0",
     "@nestjs/testing": "^10.0.0",
+    "@types/bcrypt": "^5.0.2",
     "@types/express": "^4.17.17",
     "@types/jest": "^29.5.2",
     "@types/node": "^20.3.1",
diff --git a/backend/src/auth/auth.controller.ts b/backend/src/auth/auth.controller.ts
new file mode 100644
index 0000000..43f42d0
--- /dev/null
+++ b/backend/src/auth/auth.controller.ts
@@ -0,0 +1,17 @@
+import { Body, Controller, Post } from '@nestjs/common';
+import { AuthService } from './auth.service';
+import { LoginCredentialsDto } from './dto/login-credentials.dto';
+import { ApiTags } from '@nestjs/swagger';
+
+@ApiTags('Auth')
+@Controller('auth')
+export class AuthController {
+  constructor(private readonly authService: AuthService) { }
+
+  @Post('credentials')
+  async loginWithCredentials(
+    @Body() loginWithCredentials: LoginCredentialsDto,
+  ) {
+    return await this.authService.login(loginWithCredentials);
+  }
+}
diff --git a/backend/src/auth/auth.module.ts b/backend/src/auth/auth.module.ts
index 26e9aa9..341aef9 100644
--- a/backend/src/auth/auth.module.ts
+++ b/backend/src/auth/auth.module.ts
@@ -1,13 +1,15 @@
 import { Module } from '@nestjs/common';
-import { JwtStrategy } from './strategies/jwt.strategy';
-
 import { ConfigModule, ConfigService } from '@nestjs/config';
 import { JwtModule } from '@nestjs/jwt';
 import { PassportModule } from '@nestjs/passport';
-import { UserModule } from 'src/user/user.module';
+
+import { AuthController } from './auth.controller';
+import { AuthService } from './auth.service';
+import { JwtStrategy } from './strategies/jwt.strategy';
+
+import { UserModule } from '../user/user.module';
 
 @Module({
-  providers: [JwtStrategy],
   imports: [
     PassportModule.register({ defaultStrategy: 'jwt' }),
 
@@ -23,9 +25,10 @@ import { UserModule } from 'src/user/user.module';
         };
       },
     }),
-
     UserModule,
   ],
+  controllers: [AuthController],
+  providers: [AuthService, JwtStrategy],
   exports: [PassportModule],
 })
 export class AuthModule {}
diff --git a/backend/src/auth/auth.service.ts b/backend/src/auth/auth.service.ts
new file mode 100644
index 0000000..75c2148
--- /dev/null
+++ b/backend/src/auth/auth.service.ts
@@ -0,0 +1,44 @@
+import { Injectable, UnauthorizedException } from '@nestjs/common';
+import { JwtService } from '@nestjs/jwt';
+
+import { LoginCredentialsDto } from './dto/login-credentials.dto';
+import { HashAdapter } from '../common/adapters/hash.adapter';
+import { UserService } from '../user/user.service';
+import { JwtPayload } from './interfaces/jwt-payload.interface';
+
+@Injectable()
+export class AuthService {
+  constructor(
+    private readonly userService: UserService,
+    private readonly jwtService: JwtService,
+  ) { }
+
+  async login({ email, password }: LoginCredentialsDto) {
+    const userFound = await this.userService.findOneByEmail(email);
+
+    const hashAdapter = new HashAdapter();
+
+    const isPasswordMatch = hashAdapter.verifyHash(
+      password,
+      userFound.password,
+    );
+
+    if (!isPasswordMatch) throw new UnauthorizedException('Incorrect password');
+
+    const token = this.getJwt({ id: userFound.id });
+
+    return {
+      id: userFound._id,
+      name: `${userFound.firstname} ${userFound.lastname}`,
+      username: userFound.username,
+      isAdmin: userFound.isAdmin,
+      email: userFound.email,
+      token,
+    };
+  }
+
+  private getJwt(payload: JwtPayload) {
+    const token = this.jwtService.sign(payload);
+    return token;
+  }
+}
diff --git a/backend/src/auth/dto/login-credentials.dto.ts b/backend/src/auth/dto/login-credentials.dto.ts
new file mode 100644
index 0000000..75a6ce1
--- /dev/null
+++ b/backend/src/auth/dto/login-credentials.dto.ts
@@ -0,0 +1,37 @@
+import { IsEmail, IsString, Length, Matches } from 'class-validator';
+import { ApiProperty } from '@nestjs/swagger';
+
+export class LoginCredentialsDto {
+  @ApiProperty({
+    description: "The user's email address",
+    example: 'user@example.com',
+  })
+  @IsEmail()
+  readonly email: string;
+
+  @ApiProperty({
+    description:
+      "The user's password. It must have between 8 and 20 characters, including at least one uppercase letter, one lowercase letter, one number, and one special character.",
+    example: 'P@ssw0rd!',
+    minLength: 8,
+    maxLength: 20,
+  })
+  @IsString()
+  @Length(8, 20, {
+    message: 'The password must have between 8 and 20 characters',
+  })
+  @Matches(/(?=.*[A-Z])/, {
+    message: 'The password must have at least one uppercase letter',
+  })
+  @Matches(/(?=.*[a-z])/, {
+    message: 'The password must have at least one lowercase letter',
+  })
+  @Matches(/(?=.*\d)/, {
+    message: 'The password must have at least one number',
+  })
+  @Matches(/(?=.*[@$!%*?&#])/, {
+    message:
+      'The password must have at least one special character (for example, @, $, !, %, *, ?, &, #)',
+  })
+  readonly password: string;
+}
diff --git a/backend/src/common/adapters/hash.adapter.ts b/backend/src/common/adapters/hash.adapter.ts
new file mode 100644
index 0000000..dddaae4
--- /dev/null
+++ b/backend/src/common/adapters/hash.adapter.ts
@@ -0,0 +1,13 @@
+import * as bcrypt from 'bcrypt';
+
+export class HashAdapter {
+  private readonly hashDependency = bcrypt;
+
+  createHash(data: string | Buffer, saltOrRounds: string | number): string {
+    return this.hashDependency.hashSync(data, saltOrRounds);
+  }
+
+  verifyHash(data: string | Buffer, encrypted: string): boolean {
+    return this.hashDependency.compareSync(data, encrypted);
+  }
+}
diff --git a/backend/src/user/dto/create-user.dto.ts b/backend/src/user/dto/create-user.dto.ts
index d1490b4..20f0500 100644
--- a/backend/src/user/dto/create-user.dto.ts
+++ b/backend/src/user/dto/create-user.dto.ts
@@ -1,36 +1,69 @@
+import { ApiProperty } from '@nestjs/swagger';
 import {
   IsBoolean,
   IsEmail,
   IsNotEmpty,
   IsOptional,
   IsString,
+  Length,
+  Matches,
 } from 'class-validator';
-import { ApiProperty, ApiBody } from '@nestjs/swagger';
+
 export class CreateUserDto {
   @IsOptional()
   @IsString()
   firstname: string;
+
   @IsOptional()
   @IsString()
   lastname: string;
+
   @IsNotEmpty()
   @IsString()
   @IsEmail()
   email: string;
-  @IsNotEmpty()
+
+  @ApiProperty({
+    description:
+      "The user's password. It must have between 8 and 20 characters, including at least one uppercase letter, one lowercase letter, one number, and one special character.",
+    example: 'P@ssw0rd!',
+    minLength: 8,
+    maxLength: 20,
+  })
   @IsString()
+  @Length(8, 20, {
+    message: 'The password must have between 8 and 20 characters',
+  })
+  @Matches(/(?=.*[A-Z])/, {
+    message: 'The password must have at least one uppercase letter',
+  })
+  @Matches(/(?=.*[a-z])/, {
+    message: 'The password must have at least one lowercase letter',
+  })
+  @Matches(/(?=.*\d)/, {
+    message: 'The password must have at least one number',
+  })
+  @Matches(/(?=.*[@$!%*?&#])/, {
+    message:
+      'The password must have at least one special character (for example, @, $, !, %, *, ?, &, #)',
+  })
   password: string;
+
   @IsOptional()
   @IsString()
   country: string;
+
   @IsOptional()
   tags: [string];
+
   @IsNotEmpty()
   @IsBoolean()
   isAdmin: boolean;
+
   @IsOptional()
   @IsString()
   description: string;
+
   @IsOptional()
   @IsString()
   imageUrl: string;
diff --git a/backend/src/user/user.module.ts b/backend/src/user/user.module.ts
index 6236548..2541a1a 100644
--- a/backend/src/user/user.module.ts
+++ b/backend/src/user/user.module.ts
@@ -1,12 +1,14 @@
 import { Module } from '@nestjs/common';
+import { MongooseModule } from '@nestjs/mongoose';
+
 import { UserService } from './user.service';
 import { UserController } from './user.controller';
-import { MongooseModule } from '@nestjs/mongoose';
 import { UserSchema } from './entities/user.entity';
+
 @Module({
   imports: [MongooseModule.forFeature([{ name: 'User', schema: UserSchema }])],
   controllers: [UserController],
   providers: [UserService],
-  exports: [MongooseModule],
+  exports: [UserService, MongooseModule],
 })
 export class UserModule {}
diff --git a/backend/src/user/user.service.ts b/backend/src/user/user.service.ts
index 8b71a9b..2fd4302 100644
--- a/backend/src/user/user.service.ts
+++ b/backend/src/user/user.service.ts
@@ -58,4 +58,13 @@ export class UserService {
     const res = await this.userModel.findByIdAndDelete(id);
     return res;
   }
+
+  async findOneByEmail(email: string) {
+    const userFound = await this.userModel.findOne({ email });
+
+    if (!userFound)
+      throw new NotFoundException(`User with email ${email} not exists`);
+
+    return userFound;
+  }
 }