Adding custom form field validation for "register_user"

[sohomhm]

Adding custom form field validation for "register_user"

[velicanu]

Yea you can definitely bring your own validation logic. Just redefine (or subclass) the Validator class and re-implement the name, username, or email validation logic as you see fit. Here's a minimal code example that changes email validation to allow only users from gmail domain:

import streamlit_authenticator as stauth
import yaml


class CustomValidator(stauth.validator.Validator):
    def validate_email(self, email: str) -> bool:
        return email.endswith("@gmail.com")


config = yaml.load("path/to/auth.yaml", Loader=yaml.SafeLoader)

authenticator = stauth.Authenticate(
    credentials=config["credentials"],
    cookie_name=config["cookie"]["name"],
    key=config["cookie"]["key"],
    cookie_expiry_days=config["cookie"]["expiry_days"],
    preauthorized=config["preauthorized"],
    validator=CustomValidator(),
)

[sohomhm]

Thanks a ton for the help! 💯