This password checker accepts at least 8, not just 8. Any help appreciated

Question

import re

def password():
    password1 = input()
    valid = re.match("[a-zA-Z]{8}", password1)
    if valid:
        print("Correct password")
    else:
        print("Not quite right")
        password()

password()

I Believe the problem to be on line 5, however I am not as experienced in this field of python