corrigiendo error de login

import {

  BadRequestException,

  HttpException,

  HttpStatus,

  Injectable,

  UnauthorizedException,

} from '@nestjs/common';

import { JwtService } from '@nestjs/jwt';

import { EncryptionService } from '../encryption/encryption.service';

    private encryptionService: EncryptionService,

  ) {}

  async signUp(createAdminDto: CreateUserDto): Promise<string> {

  async signUp(createAdminDto: CreateUserDto): Promise<UserSigninResDto> {

    const loginAdminDto: LoginUserDto = {

      email: createAdminDto.email,

      password: createAdminDto.password,

      createAdminDto.password,

    );

    createAdminDto.password = hashedPwd;

    if (this.userService.userExists(createAdminDto.email)) {

    if (await this.userService.userExists(createAdminDto.email)) {

      throw new BadRequestException('User already exists');

    }

    await this.userService.create(createAdminDto);

    const adminSigninResDto: UserSigninResDto =

      await this.signIn(loginAdminDto);

    return adminSigninResDto.token;

    return adminSigninResDto;

  }

  async signIn(logInAdmin: LoginUserDto): Promise<UserSigninResDto> {

    const user: User = await this.userService.findOne(logInAdmin.email);

    if (!user) throw new UnauthorizedException('Invalid credentials');

    const validPwd: boolean = await this.encryptionService.comparePassword(

      logInAdmin.password,

      user.password,

    );

    if (!validPwd) {

      throw new HttpException('Invalid credentials', HttpStatus.UNAUTHORIZED);

      throw new UnauthorizedException('Invalid credentials');

    }

    const accessToken = await this.jwtService.sign(

      { email: user.email, name: user.name, lastName: user.lastName },

      { secret: JwtConstants.SECRET },

    );

    const userSigninResDto: UserSigninResDto = {

      userId: user.userId,

      email: user.email,

      name: user.name,

      lastName: user.lastName,