added shutil and removal of working dir after secure delete

bitwardenBackup.py

@@ -12,6 +12,7 @@ import optparse
 import hmac as pyhmac
 import datetime
 import time
+import shutil
 from secure_delete import secure_delete
 from kmip.core import enums
 from kmip.pie import client
@@ -492,6 +493,8 @@ if __name__ == "__main__":
                 
                 logger.info("Securely deleting files")
                 secure_delete.secure_delete(working_directory)
+                logger.info("Removing working directory")
+                shutil.rmtree(working_directory)
 
             else:
                 logger.error("Unable to unlock vault, please check vault password")