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"""Allows users to authenticate directly."""
from flask import current_app as app
from authlib.oauth2.rfc6749 import grants
from gn_auth.auth import db
from gn_auth.auth.authentication.users import valid_login, user_by_email
from gn_auth.auth.authorisation.errors import NotFoundError
class PasswordGrant(grants.ResourceOwnerPasswordCredentialsGrant):
"""Implement the 'Password' grant."""
TOKEN_ENDPOINT_AUTH_METHODS = ["client_secret_basic", "client_secret_post"]
def authenticate_user(self, username, password):
"Authenticate the user with their username and password."
with db.connection(app.config["AUTH_DB"]) as conn:
try:
user = user_by_email(conn, username)
return user if valid_login(conn, user, password) else None
except NotFoundError as _nfe:
return None
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