app.config['SQLALCHEMY_DATABASE_URI'] = environ.get(
    'dbURL') or 'mysql+mysqlconnector://root@localhost:3306/lms'
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
app.config['SQLALCHEMY_ENGINE_OPTIONS'] = {'pool_size': 100,
                                           'pool_recycle': 280}

db = SQLAlchemy(app)

CORS(app)