import json

def add_account(username, password):
    accounts[username] = password


flag = True
accounts = {}
filename = 'accounts.json'
with open(filename) as file_obj:
    accounts = json.load(file_obj)


while flag:

    print("\n( 1 ) - Criar Conta")
    print("( 2 ) - Login")
    print("( 3 ) - Eliminar Conta\n")

    choice = input("--> ")

    try:
        choice = int(choice)
    except ValueError:
        print("You have to choose a number")
    else:
        if choice < 1 or choice > 3:
            print("Write a number between 1-3")
            continue
        elif choice == 1:

            username = input("Username: ")
            password = input("Password: ")

            while username in accounts.keys():
                print("That account is already registered!")
                username = input("Username: ")
                password = input("Password: ")

            add_account(username, password)
            print("Account added!!")

        elif choice == 2:

            username = input("Username: ")
            password = input("Password: ")

            while accounts[username] != password:
                print("Wrong login")
                username = input("Username: ")
                password = input("Password: ")
            print("Logged in sucessfully!")

        elif choice == 3:
            username = input("Username: ")
            password = input("Password: ")

            while accounts[username] != password:
                print("Login incorreto")
                username = input("Username: ")
                password = input("Password: ")
            accounts.pop(username)
            print("Account deleted sucessfully!")

    with open(filename, 'w') as file_obj:
        json.dump(accounts, file_obj)