No username or email provided

[Okman321456]

Hi, I have used your package to login sso with Okta IdP.
When call login from browser, it will direct to login page of Okta. After login, it will call to acs/ path. And raise an error [django_saml2_auth.utils.handle_exception] No username or email provided.
I have no idea for this problem. Please help me with that. Thank you so much!
This is my setting:
SAML2_AUTH = {
'DEFAULT_NEXT_URL': '/admin/', # after login, it will redirect to this URL.
'ENTITY_ID': "https://090e-14-176-231-159.ngrok-free.app/sso/acs/",
'NAME_ID_FORMAT': 'urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress',
'USE_JWT': False, # use JWT for info storage, can be True or False
'KEY_FILE': './private_key.pem',
'CERT_FILE': './public_certificate.pem',
'ENCODING': 'UTF-8',
'LOGIN_URL': [http:url/to/okta/login/],
'METADATA_AUTO_CONF_URL': [http:url/to/okta/metadata],
'ASSERTION_URL': 'https://090e-14-176-231-159.ngrok-free.app',
'ATTRIBUTES_MAP': {
# Change Email/UserName/FirstName/LastName to corresponding SAML2 userprofile attributes.
'email': 'user.email',
'username': 'user.username',
'first_name': 'user.first_name',
'last_name': 'user.last_name',
},
'CREATE_USER': True, # Create a new Django user when a new user logs in. Defaults to True.
'NEW_USER_PROFILE': {
'USER_GROUPS': [], # The default group name when a new user logs in
'ACTIVE_STATUS': True, # The default active status for new users
'STAFF_STATUS': False, # The staff status for new users
'SUPERUSER_STATUS': False, # The superuser status for new users
},
'LOGIN_CASE_SENSITIVE': True, # whether of not to get the user in case_sentive mode
'AUTHN_REQUESTS_SIGNED': True, # Require each authentication request to be signed
'WANT_ASSERTIONS_SIGNED': True, # Require each assertion to be signed
'WANT_RESPONSE_SIGNED': True, # Require response to be signed
'LOGGING': {
'version': 1,
'formatters': {
'simple': {
'format': '[%(asctime)s] [%(levelname)s] [%(name)s.%(funcName)s] %(message)s',
},
},
'handlers': {
'stdout': {
'class': 'logging.StreamHandler',
'stream': 'ext://sys.stdout',
'level': 'DEBUG',
'formatter': 'simple',
},
},
'loggers': {
'saml2': {
'level': 'DEBUG'
},
},
'root': {
'level': 'DEBUG',
'handlers': [
'stdout',
],
},
},
}