Init core objects.

def init_core(app):
    """Init core objects."""
    from rio import models # noqa
    db.init_app(app)
    celery.init_app(app)
    redis.init_app(app)
    cache.init_app(app)
    sentry.init_app(app)
    graph.init_app(app)
    setup_migrate(app)
    setup_user_manager(app)