public class User{
private static int nextId = 0;

    private String username;
    private String password;
    private String email;
    private int userID;

public User(String loginName, String initialPassword, String emailAddress){
    this.username = loginName;
    this.password= initialPassword;
    this.email = emailAddress;
    userID = nextId;
    nextId++;
}

public String getUsername(){
    return this.username;
}

public String getEmail(){
    return this.email;
}

public int getId(){
    return this.nextId;
}

public boolean checkPassword(String guess){
    if (guess == this.password){
    return true;
    }
    return false;
}

public boolean updatePassword(String oldPassword, String newPassword){
    if (oldPassword == this.password){
    this.password = newPassword;
    return true;
    }
    return false;
    }
}