code: def generate_uid():
      
      # first must be a letter
      first = random.choice(string.ascii_letters)
      # rest must be letters or numbers
      rest = ''.join(random.choice(string.ascii_letters + string.digits) for _ in range(10))
      return first + rest
docs: Create DHIS2 UID matching to Regex
      ^[A-Za-z][A-Za-z0-9]{10}$
      :return: UID string