added a logout in the beginning to ensure a clean start

bitwardenBackup.py

@@ -471,6 +471,8 @@ if __name__ == "__main__":
             sys.exit(1)
     else:
         emails = emails_from_config_file
+    logger.debug("Logging out of any Bitwarden account to start fresh")
+    logger.debug((subprocess.run([bitwarden_cli_executable, 'logout'], capture_output=True).stdout).decode())
     for email in emails:
         vault_password = accounts[email]['account_vault_password']
         os.environ["BW_CLIENTID"] = accounts[email]['account_api_client_id']