input: Write a python function to generate a list of 5 unique random numbers between 1 and 30.
  assert len(generateList()) == 5
  assert all(1 <= num <= 30 for num in generateList())
  assert len(set(generateList())) == 5
output: import random
  
  def generateList():
      return random.sample(range(1, 31), 5)