input: Write a function to generate a random number between two given numbers as input. The function should use Python's built-in random module to generate the number.
  assert random_number_generator(2, 5) in [2, 3, 4, 5]
  assert random_number_generator(1, 10) in [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
  assert random_number_generator(-3, 3) in [-3, -2, -1, 0, 1, 2, 3]
  assert random_number_generator(100, 150) in range(100, 151)
  assert random_number_generator(0, 1) in [0, 1]
output: import random
  
  def random_number_generator(a, b):
      return random.randint(a, b)