How to use the flask-api.config function in Flask-API

from flask_cors import CORS
from flask_restful import Resource, reqparse
from flask_restful_swagger_2 import Api, swagger, Schema

from neo4j.v1 import GraphDatabase, basic_auth, ResultError

from . import config


app = Flask(__name__)
app.config['SECRET_KEY'] = 'super secret guy'
api = Api(app, title='Neo4j Movie Demo API', api_version='0.0.10')
CORS(app)


driver = GraphDatabase.driver('bolt://localhost', auth=basic_auth(config.DATABASE_USERNAME, str(config.DATABASE_PASSWORD)))


def get_db():
    if not hasattr(g, 'neo4j_db'):
        g.neo4j_db = driver.session()
    return g.neo4j_db


@app.teardown_appcontext
def close_db(error):
    if hasattr(g, 'neo4j_db'):
        g.neo4j_db.close()


def set_user(sender, **extra):
    auth_header = request.headers.get('Authorization')