mezontleTeam/DatabaseManager.java

import java.sql.*;

public class DatabaseManager {
    private static final String URL = "jdbc:mysql://db4free.net:3306/basecursos";
    private static final String USERNAME = "edgarivanjc";
    private static final String PASSWORD = "edgarivanJC12";

    public static User getAuthenticatedUser(String nombre, String contrasena) {
        User user = null;
        try (Connection conexion = DriverManager.getConnection(URL, USERNAME, PASSWORD)) {
            String consulta = "SELECT * FROM usuarios WHERE nombre = ? AND contrasena = ?";
            try (PreparedStatement statement = conexion.prepareStatement(consulta)) {
                statement.setString(1, nombre);
                statement.setString(2, contrasena);
                try (ResultSet resultSet = statement.executeQuery()) {
                    if (resultSet.next()) {
                        int id = resultSet.getInt("id");
                        String nombreUsuario = resultSet.getString("nombre");
                        String email = resultSet.getString("email");
                        String contrasenaUsuario = resultSet.getString("contrasena");
                        user = new User(id, nombreUsuario, email, contrasenaUsuario);
                    }
                }
            }
        } catch (SQLException ex) {
            ex.printStackTrace();
        }
        return user;
    }
}