Need help with pseuo -bank account using OOP

[obieze998]

d1 = 0
d2 = 0
d3 = 0
y1 = 0
w1 = 0
pin = 0
class Bank_Account: 
    def pincheck(self, pin):
       if pin in  data:
           data[pin]
           return True
       else:

          return False
          print("WRONG PIN")
     # constructor or initializer
    def __init__(self, name, money, pin1):
         self.__name = name
         self.__balance = money   # __balance is private now, so it is only accessible inside the class
         self.__pin = pin1
         

    def deposit(self, money):
         self.__balance += money
 
    def withdraw(self, money):
         if self.__balance > money :
             self.__balance -= money
             return money
         else:
             return "Insufficient funds"
 
    def checkbalance(self):
         return self.__balance
    def next_step():
        while True:
              y2 = int(input("Enter 1 if you want to make a withdrawal, enter 2 if you don't"))
        if y2 == 1:
           enter_pin()
        else:
            print("ERROR, TRY AGAIN")


Bone = Bank_Account('Obi Ezeakachi', 5000, 1111) 
Btwo = Bank_Account('Tasha St.Patrick', 80000 , 2222)
Bthree = Bank_Account('Tommy Egan', 7000, 3333)

data = {'1111':  Bone  , '2222' :  Btwo , '3333' :  Bthree }
data = {int(pin):value for key, value in data.items()}

def enter_pin():
     while True:
      pin = int( input("Enter pin "))# keeps asking for the correct pin 
      if pin in data:
         data[pin]
         return True
      else:
       print("INCORRECT PIN TRY AGAIN")

account = enter_pin()

#if Bone.pincheck(pin):  
print("      ",account.checkbalance())
y1 = int(input("Enter 1 if you for a withdrawal, enter 2 if you don't"))
if y1 == 1:
   w1 = input("How much do you want withdraw")
   int(w1)
   print("Withdrawal: £",account.withdraw(w1))
   print("Current Balance:",account.checkbalance())
   next_step()
else:
   d1 = int(input("How much do you want to deposit"))   
   account.deposit(d1)   
   print("Current Balance:",account.checkbalance())
   next_step()

This is the changes I've implemented but i'm still getting the same issue as before