i just finishing running the makemigration & migrate command 
it's OK
but when i run python manage.py createsuperuser

i receive this message :
python: can't open file 'manage.py': [Errno 2] No such file or directory

i did not know what is my mistake 

this is my python file:

```
#!/usr/bin/env python
"""Django's command-line utility for administrative tasks."""
import os
import sys

def main():
    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'oasisconsuting.settings')
    try:
        from django.core.management import execute_from_command_line
    except ImportError as exc:
        raise ImportError(
            "Couldn't import Django. Are you sure it's installed and "
            "available on your PYTHONPATH environment variable? Did you "
            "forget to activate a virtual environment?"
        ) from exc
    execute_from_command_line(sys.argv)

if __name__ == '__main__':
    main()

```

maybe (i'm not sure) i change some code or anything