Problem with referring to methods in classes in python

Question

i have this code:

class Contact:
    def __init__(self, name, phone):
        Contact.name = name
        Contact.phone = phone
class AddContact:
    def __init__(self):
        self.People = []
    def add_people(self, x):
       self.People.append(x)
    def print_contact(self):
        for x in self.People:
            print("name:" + x.name)
            print("phone:", x.phone)

while True:
    print("----MENU----")
    print("1 -> add contact")
    print("2 -> contact list")
    choice = int(input("enter your choice: "))
    if choice == 1:
        name = input("enter the name of the contact: ")
        phone = input("enter the phone number of the contact: ")
        person = Contact(name, phone)
        AddContact.add_people(person)
    if choice == 2:
        AddContact.print_contact()

what im trying to make is a contact book where the user can add and view all of his contacts, ive recently learned classes and thought this was the correct way to make it but i get issues the erros im getting is that the parameters x and self are unfilled on this line:

def add_people(self, x):

when i call them below outside of the class, ive been trying but i dont understand the problem and would like some assistance. thanks is advance.