old_contents: from flask import Flask
  
  from database import db_session, init_db
  from flask_graphql import GraphQL
  from schema import schema
  
  app = Flask(__name__)
  app.debug = True
  
  default_query = '''
  {
    allEmployees {
      edges {
        node {
          id,
          name,
          department {
            id,
            name
          },
          role {
            id,
            name
          }
        }
      }
    },
  }'''.strip()
  
  GraphQL(app, schema=schema, default_query=default_query)
  
  
  @app.teardown_appcontext
  def shutdown_session(exception=None):
      db_session.remove()
  
  if __name__ == '__main__':
      init_db()
      app.run()
  
new_contents: from flask import Flask
  
  from database import db_session, init_db
  from flask_graphql import GraphQL
  from schema import schema
  
  app = Flask(__name__)
  app.debug = True
  
  default_query = '''
  {
    allEmployees {
      edges {
        node {
          id,
          name,
          department {
            id,
            name
          },
          role {
            id,
            name
          }
        }
      }
    }
  }'''.strip()
  
  GraphQL(app, schema=schema, default_query=default_query)
  
  
  @app.teardown_appcontext
  def shutdown_session(exception=None):
      db_session.remove()
  
  if __name__ == '__main__':
      init_db()
      app.run()
  
subject: remove ending coma