code: func CryptoRandomAlphaNumericCustom(count int, letters bool, numbers bool) (string, error) {
  	return CryptoRandom(count, 0, 0, letters, numbers)
  }
docs: /*
  CryptoRandomAlphaNumericCustom creates a random string whose length is the number of characters specified.
  Characters will be chosen from the set of alpha-numeric characters as indicated by the arguments.
  
  Parameters:
  	count - the length of random string to create
  	letters - if true, generated string may include alphabetic characters
  	numbers - if true, generated string may include numeric characters
  
  Returns:
  	string - the random string
  	error - an error stemming from an invalid parameter within underlying function, CryptoRandom(...)
  */