input: Write a python function to determine the maximum number that can be created using the provided digits.
  assert create_largest_number([1,2,3],3) == 321
  assert create_largest_number([4,5,6,1],4) == 6541
  assert create_largest_number([1,2,3,9],4) == 9321
output: def create_largest_number(digits, length):
      return int("".join(sorted(map(str, digits), reverse=True)))