passport strategy is not invoking while using passport-oauth2 in nestjs

[Sanjeevi03]

strategy.ts is not invoking and not logging the user variable.
I tried to authenticate the user using passport-oauth2 package in nestjs.The problem is, strategy is not calling and not returning the user's accessToken.My expectation is strategy.ts file should return the accessToken and user.
passport authentication is working perfectly in express.js but not in nest.js

auth.controller.ts

import { Controller, Get, Req, Res, UseGuards } from '@nestjs/common';
import { AppService } from './app.service';
import { AuthGuard } from '@nestjs/passport';
import { Request, Response } from 'express';
@Controller()
export class AppController {
  constructor(private readonly appService: AppService) {}
  @Get()
  @UseGuards(AuthGuard('oauth2'))
  async login() {
    return 'hello world'
  }
  @Get('callback')
  @UseGuards(AuthGuard('oauth2'))
  callback(@Req() req:Request, @Res() res: Response) {
    res.redirect('/');
  }
}

strategy.ts

import { Injectable } from '@nestjs/common';
import { PassportStrategy } from '@nestjs/passport';
import { Strategy,VerifyCallback } from 'passport-oauth2'
@Injectable()
export class LocalStrategy extends PassportStrategy(Strategy,'oauth2') {
  constructor() {
    super({
      authorizationURL: 'www.example.com/login/connect/authorize',
      tokenURL: 'www.example.com/login/connect/token',
      clientID: 'client-id',
      clientSecret: 'client-secret',
      callbackURL: 'url/callback',
      passReqToCallback: true
    });
  }
async validate(accessToken: string, refreshToken: string, profile: any, done: VerifyCallback): Promise<any> {
  var user = {
    accessToken: accessToken,
    refreshToken: refreshToken,
    profile: profile
  };
  console.log(user);
  return done(null, user);
 }
}

And I'm not sure UseGuards(AuthGuard('oauth2')) is working. Any solution or ideas please!

[RochMoreau]

Is your strategy LocalStrategy defined as a provider in your auth module ?