this is my function for taking input for login and sending it to backend for authentication and redirection to a particular page:

const onSubmit = async (data) => {
    try {
      const response = await fetch("http://localhost:3000/login", {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
        },
        body: JSON.stringify(data),
        credentials: 'include'
      });
      if (response.ok) {
        window.location.href = ("http://localhost:3001/");
      } else {
        console.error("Login failed");
      }
    } catch (error) {
      console.error("Error:", error);
    }
  };

this is the server code for login authentication:

app.post('/login',
  passport.authenticate('local', { failureRedirect: '/login'}, console.log("login failed")),
  function(req, res) {
    res.status(200).json({ isAuthenticated: true }, console.log(" login success"));
  }
);

I dont know why i am getting a “GET http://localhost:3000/login 404 (Not Found)” error in the client side console due to which user is not able to login. All the requests which i am hitting are POST.

Tried to ask chatgpt but it didn’t help me.

Any kind of suggestions will be very grateful.