Simple login program in python, for beginner

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em = [] # empty list defined for email

pa = []   # empty list defined for password 

def login(): # function for logging in
    email = input('email')
    password = input('password')
    for i in em:
        if i == email:
            for j in pa:
                if j == password:
                    print('You are successfully logged in ')
        break
    else:
        print('wrong id or password ')


def signup(): # function for signing up
    email = input('Email')
    password =input('password')
    em.append(email)
    print(em)
    pa.append(password)
    print(pa)
    personal_details()
def personal_details():    # function to display to user
    print('what do you want to do')
    print('1.login', end=" ")
    print('2.signup')
    inp = int(input('Enter your choice here: '))
    if inp == 1:
        print('Login')
        return login()
    elif inp == 2:
        print('Signup')
        return signup()
    else:
        print('invalid input')
personal_details()

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