creando guard para la autenticacione

import { CanActivate, ExecutionContext, Injectable, UnauthorizedException } from '@nestjs/common';

import { Reflector } from '@nestjs/core';

import { AuthService } from 'src/shared/service/auth.service';

import { Roles } from '../role.decorator';

@Injectable()

export class AuthGuard implements CanActivate {

  constructor(

    private authService: AuthService,

    private reflector: Reflector,

  ) {}

  async canActivate(context: ExecutionContext): Promise<boolean> {

    const requiredRole = this.reflector.get(Roles, context.getHandler());

    console.log(requiredRole);

    if (!requiredRole) return true;

    const request = context.switchToHttp().getRequest();

    const { authorization }: any = request.headers;

    if (!authorization) throw new UnauthorizedException('session expired! Please sign In');

    const role = await this.authService.validateToken(authorization);

    if (!requiredRole.includes(role)) throw new UnauthorizedException('Unauthorized access');

    return true;

  }

}