agregando excepcion cuando hay un usuario repetido

import { HttpException, HttpStatus, Injectable } from '@nestjs/common';

import {

  BadRequestException,

  HttpException,

  HttpStatus,

  Injectable,

} from '@nestjs/common';

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

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

import { JwtConstants } from 'src/constants/jwt.constants';

      createAdminDto.password,

    );

    createAdminDto.password = hashedPwd;

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

      throw new BadRequestException('User already exists');

    }

    await this.userService.create(createAdminDto);

    const adminSigninResDto: UserSigninResDto =