Passport策略如何知道在nestJS中选择正确的jwt策略？

import { Module } from '@nestjs/common';
import { PassportModule } from '@nestjs/passport';
import { JwtModule } from '@nestjs/jwt';

@Module({
  imports: [
    PassportModule,
    JwtModule.register({
      secret: 'your_secret_key',
      signOptions: { expiresIn: '1h' },
    }),
  ],
})
export class AppModule {}

import { Injectable } from '@nestjs/common';
import { PassportStrategy } from '@nestjs/passport';
import { Strategy, ExtractJwt } from 'passport-jwt';

@Injectable()
export class JwtStrategy extends PassportStrategy(Strategy) {
  constructor() {
    super({
      jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),
      secretOrKey: 'your_secret_key',
    });
  }

  async validate(payload: any) {
    return { userId: payload.sub, username: payload.username };
  }
}

import { Controller, Get, UseGuards } from '@nestjs/common';
import { JwtAuthGuard } from './jwt-auth.guard';

@Controller('users')
export class UsersController {
  @Get()
  @UseGuards(JwtAuthGuard)
  findAll() {
    // 处理需要验证的路由逻辑
  }
}

import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';
import { ValidationPipe } from '@nestjs/common';

async function bootstrap() {
  const app = await NestFactory.create(AppModule);
  app.useGlobalPipes(new ValidationPipe());
  await app.listen(3000);
}
bootstrap();