Casbin role watcher to be used for monitoring updates to casbin policies
pip install casbin-postgresql-watcher
from flask_authz import CasbinEnforcer
from postgresql_watcher import PostgresqlWatcher
from flask import Flask
from casbin.persist.adapters import FileAdapter
casbin_enforcer = CasbinEnforcer(app, adapter)
watcher = PostgresqlWatcher(host=HOST, port=PORT, user=USER, password=PASSWORD, dbname=DBNAME)
watcher.set_update_callback(casbin_enforcer.e.load_policy)
casbin_enforcer.set_watcher(watcher)