As @Babu said in the comments, It looks like you may not have added your app to INSTALLED_APPS
in your settings.py
.
It's also possible that you're missing the __init__.py
files (that are required in python modules) from the management
and commands
folders.
Alternatively, (sorry to say this) you may have misspelt "management" or "commands", or even the name of the command you're running.