input: Write a function to create an account, deposit money, withdraw money, and print balance in an ATM class.
  assert atm.createAccount("Alice", 1000) == None
  assert atm.createAccount("Bob", 500) == None
  assert atm.deposit("Alice", 200) == None
  assert atm.withdrawal("Bob", 100) == None
  assert atm.printBalance("Alice") == "Alice  Balance:  1200"
  assert atm.printBalance("Bob") == "Bob  Balance:  400"
output: class ATM:
      def __init__(self):
          self.accounts = {}
      
      def createAccount(self, name, initial_balance):
          self.accounts[name] = initial_balance
      
      def deposit(self, name, amount):
          if name in self.accounts:
              self.accounts[name] += amount
      
      def withdrawal(self, name, amount):
          if name in self.accounts and self.accounts[name] >= amount:
              self.accounts[name] -= amount
      
      def printBalance(self, name):
          if name in self.accounts:
              return f"{name}  Balance:  {self.accounts[name]}"
  
  atm = ATM()