Extending Quart-Auth

Quart-Auth is meant to be extended, much like Quart (and Flask), a good example of this is loading user data from a database,

from quart import Quart
from quart_auth import AuthUser, QuartAuth, current_user, login_required

class User(AuthUser):
    def __init__(self, auth_id):
        super().__init__(auth_id)
        self._resolved = False
        self._email = None

    async def _resolve(self):
        if not self._resolved:
            self._email = await db.fetch_email(self.auth_id)
            self._resolved = True

    @property
    async def email(self):
        await self._resolve()
        return self._email

auth_manager = QuartAuth()
auth_manager.user_class = User

app = Quart(__name__)

@app.route("/")
@login_required
async def index():
    return await current_user.email

auth_manager.init_app(app)

If you are used to Flask-Login you are likely expecting the current_user to be fully loaded without the extra resolve step, you can write something like:

from quart import Quart
from quart_auth import AuthUser, QuartAuth, current_user, login_required

class User(AuthUser):
    def __init__(self, auth_id):
        super().__init__(auth_id)
        self.email = None
        self.name = None

    async def load_user_data(self):
        user_data = await db.fetch_user_data(self.auth_id)

        self.email = user_data.get("email", None)
        self.name = user_data.get("name", None)

auth_manager = QuartAuth()
auth_manager.user_class = User

app = Quart(__name__)

@app.route("/")
@login_required
async def index():
    return current_user.email

auth_manager.init_app(app)

@app.before_request
@app.before_websocket
async def load_full_user_data():
    await current_user.load_user_data()