<commit_before>package atm;

import java.io.Serializable;

public class Credentials implements Serializable{
    private String id; // Key Field
    private String pin;
    private int balance;

    public Credentials(String id, String pin) {
        this.id = id;
        this.pin = pin;
        this.balance = 0;
    }

    @Override
    public String toString() {
        return "Credentials{" + "id=" + id + ", pin=" + pin + ", balance=" + balance + '}';
    }

    public String getId() {
        return id;
    }

    public String getPin() {
        return pin;
    }<commit_msg>Added javadocs<commit_after>package atm;

import java.io.Serializable;

/**
 * Node for typical bank-like accounts.
 */
public class Credentials implements Serializable{
    private String id; // Key Field
    private String pin;
    private int balance;

    public Credentials(String id, String pin) {
        this.id = id;
        this.pin = pin;
        this.balance = 0;
    }

    @Override
    public String toString() {
        return "Credentials{" + "id=" + id + ", pin=" + pin + ", balance=" + balance + '}';
    }

    public String getId() {
        return id;
    }

    public String getPin() {
        return pin;
    }
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