private String firstName, lastName, email, role;
public String password;

public User(){
    firstName = "";
    lastName = "";
    email = "";
}

public User(String firstName, String lastName, String email, String password
       ,String role) {
    this.firstName = firstName;
    this.lastName = lastName;
    this.email = email;
    this.password = password;
    this.role = role;
}

public String getRole() {
    return role;
}

public void setRole(String role) {
    this.role = role;
}

public String getPassword() {
    return password;
}

public void setPassword(String password) {
    this.password = password;
}

public String getFirstName() {
    return firstName;
}

public String getLastName() {
    return lastName;
}

public String getEmail() {
    return email;
}

public void setfirstName(String firstName) {
    this.firstName = firstName;
}

public void setlastName(String lastName) {
    this.lastName = lastName;
}

public void setEmail(String em) {
    email = em;
}

protected void processRequest(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    response.setContentType("text/html;charset=UTF-8");
    String type = request.getParameter("formtype");
    String email, password, firstName, lastName, role, url = null;
    User user = null;

    if (type.equals("login")){
        email = request.getParameter("email");
        password = request.getParameter("password");
        user = UserUtils.authUser(email, password);
        if(user == null){
            url = "/index.jsp";
            request.setAttribute("errorMsg", "Invalid Credentials");
        }
        else{
            url = "/home.jsp";
            request.setAttribute("user", user);
        }
    }
    else if(type.equals("signup")){
        email = request.getParameter("email");
        firstName = request.getParameter("firstName");
        lastName = request.getParameter("lastName");
        password = request.getParameter("password");
        role = request.getParameter("role");
        user = new User(firstName, lastName, email, password, role);
        request.setAttribute("user", user);
        String error = UserUtils.validateUser(user);
        if(!error.equals("")){
            url = "/index.jsp";
            request.setAttribute("error", error);
        }
        else {
            UserUtils.addUser(user);
            url = "/confirmationPage.jsp";
        }
    }
this.getServletContext().getRequestDispatcher(url).forward(request, response);
}

@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    processRequest(request, response);
}

@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    doPost(request, response);
}