React Axios Post Always return Cannot post - reactjs

Question

Well my problem its that always that i send the login info to the backend, react return me Cannot Post /login. The problem its that i have a res.redirect to the main page but it dosent work and i dont know if its an error of Axios or the controller, because the information arrives correctly. What do you think? What issue im having?
React Login
import React, {Component} from "react";
import "./user.css"
import Api from "../Instrumentos/apiInstrumentos"
import { withRouter } from "react-router";
class User extends Component {
constructor(props){
super(props);
this.state = {
user: []
}
};
async componentDidMount(){
try{
console.log()
const id = this.props.match.params.id;
let user = await fetch(`http://localhost:5000/user/${id}`).then(response =>
response.json())
this.setState({
user: user
});
console.log(this.state.user)
}
catch(error){
console.log(error);
}
}
render(){
let user = this.state.user
return (
<section id="user-detail">
<section id="user_saved">
<article>
<figure id="user_figure">
<img src={`http://localhost:5000${user.photo}`} />
</figure>
<h3 id="bienvenido_user">Bienvenido {user.nombre}</h3>
<form className="margin-sections">
<fieldset>
<input type="text" name="" placeholder={user.nombre}
className="input-profile"></input>
</fieldset>
<fieldset>
<input type="text" name="apellido" placeholder={user.apellido}
className="input-profile"></input>
</fieldset>
<fieldset>
<input type="password" name="password" placeholder={user.password}
className="input-profile"></input>
</fieldset>
<fieldset>
<button className="button-login button-detail"
type="submit">Enviar</button>
</fieldset>
</form>
</article>
<article>
<h3 id="Instrumentos_guardados">Instrumentos Guardados</h3>
<Api />
</article>
</section>
</section>
);
}
}
useForm Hook
import {useState} from 'react';
import Axios from 'axios';
export const useForm = (initialForm, validateForm) => {
const [form, setForm] = useState(initialForm);
const [errors, setErrors] = useState({});
const [loading,] = useState(false);
const [response,] = useState(null);
const handleChange = (e) => {
const { name,value } = e.target;
setForm({
...form,
[name]: value
});
};
const handleBlur = (e) => {
handleChange(e);
setErrors(validateForm(form));
};
const handleSubmit = (e) => {
setErrors(validateForm(form));
Axios
.post('http://localhost:5000/usuarios/login', form)
.then(response => {
console.log(response)
})
.then(data => console.log(data))
.catch(error => {
console.log(error)
})
};
return {
form,
errors,
loading,
response,
handleChange,
handleBlur,
handleSubmit
};
}
Backend Controller
const main = {
acceso: async (req, res) => {
console.log(req.body)
return res.redirect("http://localhost:3000")
}
}
Backend Routes
const express = require('express');
const router = express.Router();
const path = require("path");
const fs = require("fs");
const user = require("../controllers/user");
const multer = require("multer");
// ************ Multer ************
const dest = multer.diskStorage({
destination: function (req, file, cb) {
let dir = path.resolve(__dirname,"../../public/uploads","users",
String(req.body.nombre).trim().replace(/\s+/g, ''))
if (!fs.existsSync(dir)){
fs.mkdirSync(dir);
}
cb(null, dir)
},
filename: function (req, file, cb) {
cb(null, file.fieldname + '-' + Date.now()+ path.extname(file.originalname))
}
})
const upload = multer({storage:dest});
// ************ Routes ************
router.post("/login", user.acceso)
router.post('/guardar', upload.single("file") , user.post)
module.exports = router;
/*** Entry Point ***/
Entry point Route definition
const users = require("./routes/user");
app.use("/usuarios", users);
/*** Console.log ***/
Console.log Response { email: 'juansepincha#gmail.com', password: '12345' }
From now thanks for all and have a great weekend!