Make a text field where the user can enter a password.

	var passwordToEdit : String = "My Password";
	function OnGUI () {
		// Make a password field that modifies passwordToEdit.
		passwordToEdit = GUILayout.PasswordField (passwordToEdit, "*"[0], 25);
	}

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    public string passwordToEdit = "My Password";
    void OnGUI() {
        passwordToEdit = GUILayout.PasswordField(passwordToEdit, "*"[0], 25);
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	public passwordToEdit as string = 'My Password'

	def OnGUI() as void:
		passwordToEdit = GUILayout.PasswordField(passwordToEdit, '*'[0], 25)