auth.py

import random

database = {}

def init():

    print('Welcome to bankPHP')
       
    haveAccount = int(input("Do you have an account with us: 1 (yes) 2 (no) \n"))

    if (haveAccount == 1):

        login()
    elif (haveAccount == 2):

        register()
    else:
        print("You have selected invalid option")

def login():

    print('********* Login **********')


    accountNumberFromUser = int(input("What is your account number? \n"))
    password = input("What is your password? \n")

    for accountNumber,userDetails in database.items():
        if(accountNumber == accountNumberFromUser):
            if(userDetails[3] == password):
                bankOperation(userDetails)

    print("Invalid account or password")
    login()

def register():

    print("****** Register ******")

    email = input("What is your email address? \n")
    first_name = input("What is your first name? \n")
    last_name = input("What is your last name? \n")
    password = input("Create a password for yourself \n")

    accountNumber = generationAccountNumber()

    database[accountNumber] = [ first_name, last_name, email, password ]

    print("Your Account Has been created")
    print(" == ==== ====== ===== ===")
    print("Your account number is: %d" % accountNumber)
    print("Make sure you keep it safe")
    print(" == ==== ====== ===== ===")

    login()

def bankOperation(user):

    print("Welcome %s %s " % (user[0], user[1]))

    selectedOption = int(input("What would you like to do? (1) deposit (2) withdrawal (3) logout (4) exit"))

    if (selectedOption == 1):

        depositOperation(user)
    elif(selectedOption == 2):

        withdrawlOperation(user)
    elif(selectedOption == 3):

        logout()
    elif(selectedOption == 4):

        exit()
    else:
        print("Invalid option selected")
        bankOperation(user)

def depositOperation(user):
    print("Deposit")
    bankOperation(user)

def withdrawlOperation(user):
    print("Withdrawl")
    bankOperation(user)
    
def generationAccountNumber():

    print('Generating account number')
    return random.randrange(1111111111,9999999999)

def logout():
    login()


init()