code: public static char[] getPropertyPassword(Class<?> aClass, String key,
  			char[] defaultPassword)
  	{
  		return getSettings().getPropertyPassword(aClass, key, defaultPassword);
  	}
docs: Retrieve the password
  
  @param aClass the class name
  @param key the configuration key
  @param defaultPassword default value
  
  @return defaultPassword if the configuration value for the key is blank