KeyError: 'APP_NAME', formatter.add_service_name(self.application.config["APP_NAME"]) #242

Describe the bug
from pyms.flask.app import Microservice
ms = Microservice()
app = ms.create_app()
if name == 'main':
app.run()

And I had this errors. Can I help me?
Traceback (most recent call last):
File "main.py", line 7, in
app = ms.create_app()
File "C:\Users\DELL\AppData\Local\Programs\Python\Python36\lib\site-packages\pyms\flask\app\create_app.py", line 164, in create_app
self.init_logger()
File "C:\Users\DELL\AppData\Local\Programs\Python\Python36\lib\site-packages\pyms\flask\app\create_app.py", line 104, in init_logger
formatter.add_service_name(self.application.config["APP_NAME"])
KeyError: 'APP_NAME'