How do I make SQLAlchemy understand that when I refer to User.hipchat_group, it should do a join through the one-to-one User.hipchat_user relation?

models.py

from datetime import datetime
from sqlalchemy.orm import backref
from hiptweet import db, login_manager


class HipChatGroup(db.Model):
    __tablename__ = "hipchat_group"
    id = db.Column(db.Integer, primary_key=True)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)


class HipChatUser(db.Model):
    __tablename__ = "hipchat_user"
    id = db.Column(db.Integer, primary_key=True)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    group_id = db.Column(db.Integer, db.ForeignKey(HipChatGroup.id), nullable=False)
    group = db.relationship(HipChatGroup, backref="users")


class User(db.Model):
    __tablename__ = "user"
    id = db.Column(db.Integer, primary_key=True)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    hipchat_user_id = db.Column(db.Integer, db.ForeignKey(HipChatUser.id), nullable=False)
    hipchat_user = db.relationship(HipChatUser, uselist=False)  # one-to-one relationship
    hipchat_group = db.relationship(
        HipChatGroup,
        secondary=HipChatUser,
        uselist=False,  # one-to-one relationship
    )