repeat = True

maindict ={}
while(repeat):
    user_count=1
    choice=int(input('Slect Option: \n1. Login \n2. Register \nChoice:'))
    if choice == 1:
        input_user=input('Enter Username: ')
        input_pass=input('Enter Password: ')

        if input_pass == maindict[input_user]:
           print('Success!')
        else:
            print ('Invalid Username or Password.')

    elif choice ==2:
            username=input('Input Your Username: ')
            password=input ('Input your Password: ')
            maindict[username]= password
            print('username and password saved. ')
            user_count=user_count+1

    else:
            print('Invalid Option')

    again=input('Do You Want to Add Account? if Yes pres "Y"')
    if again == 'Y' or 'y':
            repeat=True
    elif again == 'N':
            break
    else:
            print('Invalid Option')