Method does not work in http-proxy-middleware, how to fix it?

Question

typescript

From one service I send a request to an address, for example , gateway:3000/users , I proxy using the http-proxy-middleware library on webamqplib:5557 .
Works if I use the function

users.module.ts

// reverse-proxy-middlewareBuilder.ts

import { Request, Response, NextFunction } from 'express';
import { createProxyMiddleware, Filter, Options, RequestHandler } from 'http-proxy-middleware';
import { MiddlewareBuilder } from '@nestjs/core';

export function ReverseProxyMiddleware(req: Request, res: Response, next: NextFunction) {
  const proxy = createProxyMiddleware(req.path, {
    target: 'http://webamqplib:5557/',
    changeOrigin: true,
  })
  proxy(req, res, next)
}

everything works fine, in the console of this service [HPM] Proxy created: /users -> webamqplib:5557

users.module.ts module

// users.module.ts

import { MiddlewareConsumer, Module, NestModule, Param } from '@nestjs/common';
import { ReverseProxyMiddleware } from 'src/reverse-proxy.middleware';
import { UsersController } from './users.controller';
import { UsersService } from './users.service';

@Module({
  controllers: [UsersController],
  providers: []
})
export class UsersModule implements NestModule {
  configure(consumer: MiddlewareConsumer) {
      consumer
      .apply(ReverseProxyMiddleware)
      .forRoutes(UsersController)
  }
}

I can’t understand why it doesn’t work through a class

import { Request, Response, NextFunction } from 'express';
import { Injectable, NestMiddleware } from '@nestjs/common';
import { createProxyMiddleware, Filter, Options, RequestHandler } from 'http-proxy-middleware';
import configs from './config/config.json';

@Injectable()
export class ReverseProxyMiddleware implements NestMiddleware {
  private proxy(path: Filter | Options, option?: Options): RequestHandler {
    return createProxyMiddleware(path, option)
  }

  use(req: Request, res: Response, next: () => void) {
    this.proxy(
        req.path, 
        {
          target: configs.users.target,
          changeOrigin: true
        }
      )
    next()
  }
}

When requesting gateway:3000/users in the console, [HPM] Proxy created: /users -> webamqplib:5557 is still displayed , as with the function, but the redirect does not occur to the address as in the first example