FileNotFoundError in graph_cli

[gregwalters]

Describe the bug
FileNotFoundError: [Errno 2] No such file or directory: '/Users//Library/Application Support/com.nccgroup.principalmapper/aws-us-gov'

To Reproduce

git checkout v1.2.0-dev
pip install .
pmapper --profile <my profile> graph create

Expected behavior
Graph creates correctly.

Full stacktrace

$ pmapper --profile <my profile> graph create
Traceback (most recent call last):
  File "/usr/local/bin/pmapper", line 8, in <module>
    sys.exit(main())
  File "/usr/local/lib/python3.9/site-packages/principalmapper/__main__.py", line 151, in main
    return graph_cli.process_arguments(parsed_args)
  File "/usr/local/lib/python3.9/site-packages/principalmapper/graphing/graph_cli.py", line 160, in process_arguments
    for subdir in org_tree_search_dir.iterdir():
  File "/usr/local/Cellar/python@3.9/3.9.13_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/pathlib.py", line 1160, in iterdir
    for name in self._accessor.listdir(self):
FileNotFoundError: [Errno 2] No such file or directory: '/Users/<my user>/Library/Application Support/com.nccgroup.principalmapper/aws-us-gov'

Running this worked around the issue:

mkdir Library/Application\ Support/com.nccgroup.principalmapper/aws-us-gov

[cascioli]

Hi there, I'd like to fix this error by searching in the correct paths and implementing a robust file existence check before execution. Please assign it to me whenever you can. Thanks!