In a Dynamic Web Project, I am trying to run a servlet from a html file. The html file loads fine but when the form is triggered, it shows a 404 error.
login.html
<form class="form-signin" method="POST" action="/ECommerce/Auth">
<a href="index.html"><img class="mb-4" src="img/Store.XYZ.png" alt="" height="30" width="180"></a>
<label for="inputEmail" class="sr-only">Email address</label>
<input type="email" id="loginusername" class="form-control" placeholder="Email address" style="margin-bottom: 4px;" required autofocus>
<label for="inputPassword" class="sr-only">Password</label>
<input type="password" id="loginpassword" class="form-control" placeholder="Password" style="margin-bottom: 4px;" required>
<button class="btn btn-lg btn-primary btn-block" style="margin-top: 12px; margin-bottom: 5px;" type="submit">Sign in</button>
<a href="register.html"><button class="btn btn-sm btn-secondary btn-block" onclick="location.href='register.html'">Don't have an account? Register</button></a>
</form>
Auth.java
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.sql.*;
import java.util.Scanner;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
@WebServlet("/Auth")
public class Auth extends HttpServlet {
private static final long serialVersionUID = 1L;
public Auth() {
Statement stmt = null;
try {
Connection con = DatabaseConnection.initializeDatabase();
System.out.println("Connected database successfully...");
......
Project structure is as follows;
Error Screen: 
