text: from flask_sqlalchemy import SQLAlchemy
  from flask_babel import Babel, lazy_gettext as _l
  from flask_login import LoginManager
  from flask_mail import Mail
  from flask_migrate import Migrate
  from flask_marshmallow import Marshmallow
  from flask_jwt_extended import JWTManager
  
  
  db = SQLAlchemy()
  login = LoginManager()
  login.login_view = 'auth.login'
  login.login_message = _l("")
  mail = Mail()
  babel = Babel()
  migrate = Migrate()
  ma = Marshmallow()
  jwt = JWTManager()
  