Bug Report

Description

According to the guide, we need to use the git/ssh protocol when working with private repositories. Following this recommendation, a dvc import fails with ModuleNotFoundError: No module named 'win32timezone'. Trying again, but this time using https, I get dulwich.client.HTTPUnauthorized: No valid credentials provided (as expected according to your guide).

Reproduce

1. Install dvc 2.10.1 using the Windows Installer.
2. Clone a dvc project.
3. Run dvc import --verbose git@github.com:YourOrg/YourPrivateRepo.git AFolder/ADvcFolder -o AFolder/ADvcFolder

YourOrg/YourPrivateRepo.git - This is a private repo initialised with dvc. ADvcFolder - Is a dvc tracked folder (e.g. via dvc add AFolder/ADvcFolder in the private repo)

Expected

Import should succeed without error.

Environment information

Output of dvc doctor:

$ dvc doctor
DVC version: 2.10.1 (exe)
---------------------------------
Platform: Python 3.8.10 on Windows-10-10.0.19044-SP0
Supports:
        azure (adlfs = 2022.2.0, knack = 0.9.0, azure-identity = 1.9.0),
        gdrive (pydrive2 = 1.10.0),
        gs (gcsfs = 2022.3.0),
        hdfs (fsspec = 2022.3.0, pyarrow = 7.0.0),
        webhdfs (fsspec = 2022.3.0),
        http (aiohttp = 3.8.1, aiohttp-retry = 2.4.6),
        https (aiohttp = 3.8.1, aiohttp-retry = 2.4.6),
        s3 (s3fs = 2022.3.0, boto3 = 1.21.21),
        ssh (sshfs = 2022.3.1),
        oss (ossfs = 2021.8.0),
        webdav (webdav4 = 0.9.5),
        webdavs (webdav4 = 0.9.5)
Cache types: <https://error.dvc.org/no-dvc-cache>
Caches: local
Remotes: local
Workspace directory: NTFS on D:\
Repo: dvc, git

Output of dvc import:

$ dvc import --verbose git@github.com:YourOrg/YourPrivateRepo.git AFolder/ADvcFolder -o AFolder/ADvcFolder
2022-04-15 23:40:52,341 DEBUG: Removing output 'AFolder\ADvcFolder' of stage: 'AFolder\ADvcFolder.dvc'.
2022-04-15 23:40:52,343 DEBUG: Removing 'D:\TestProject\AFolder\ADvcFolder'
Importing 'AFolder/ADvcFolder (git@github.com:YourOrg/YourPrivateRepo.git)' -> 'AFolder\ADvcFolder'
2022-04-15 23:40:52,352 DEBUG: Computed stage: 'AFolder\ADvcFolder.dvc' md5: '0f2babe69537617c1ffa8526e9d72c0a'
2022-04-15 23:40:52,353 DEBUG: 'md5' of stage: 'AFolder\ADvcFolder.dvc' changed.
2022-04-15 23:40:52,355 DEBUG: Creating external repo git@github.com:YourOrg/YourPrivateRepo.git@None
2022-04-15 23:40:52,356 DEBUG: erepo: git clone 'git@github.com:YourOrg/YourPrivateRepo.git' to a temporary dir
2022-04-15 23:40:53,433 ERROR: failed to import 'AFolder/ADvcFolder from 'git@github.com:YourOrg/YourPrivateRepo.git'. - Failed to clone repo 'git@github.com:YourOrg/YourPrivateRepo.git' to 'C:\Users\user\AppData\Local\Temp\tmpbeadgsg7dvc-clone'
------------------------------------------------------------
Traceback (most recent call last):
  File "scmrepo\git\backend\dulwich\__init__.py", line 193, in clone
  File "dulwich\porcelain.py", line 443, in clone
  File "dulwich\client.py", line 535, in clone
  File "dulwich\client.py", line 601, in fetch
  File "dulwich\client.py", line 1088, in fetch_pack
  File "dulwich\client.py", line 1756, in _connect
  File "fsspec\asyn.py", line 85, in wrapper
  File "fsspec\asyn.py", line 65, in sync
  File "fsspec\asyn.py", line 25, in _runner
  File "scmrepo\git\backend\dulwich\asyncssh_vendor.py", line 149, in _run_command
  File "asyncssh\connection.py", line 7687, in connect
  File "asyncio\tasks.py", line 455, in wait_for
  File "asyncssh\connection.py", line 429, in _connect
  File "asyncio\base_events.py", line 1050, in create_connection
  File "asyncio\base_events.py", line 1068, in _create_connection_transport
  File "asyncssh\connection.py", line 7678, in conn_factory
  File "asyncssh\connection.py", line 3064, in __init__
  File "asyncssh\gss_win32.py", line 168, in __init__
  File "sspi.py", line 200, in __init__
ModuleNotFoundError: No module named 'win32timezone'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "dvc\scm.py", line 106, in clone
  File "scmrepo\git\__init__.py", line 143, in clone
  File "scmrepo\git\backend\dulwich\__init__.py", line 196, in clone
scmrepo.exceptions.CloneError: Failed to clone repo 'git@github.com:YourOrg/YourPrivateRepo.git' to 'C:\Users\user\AppData\Local\Temp\tmpbeadgsg7dvc-clone'     

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "dvc\commands\imp.py", line 15, in run
  File "dvc\repo\imp.py", line 6, in imp
  File "dvc\repo\__init__.py", line 48, in wrapper
  File "dvc\repo\scm_context.py", line 152, in run
  File "dvc\repo\imp_url.py", line 83, in imp_url
  File "funcy\decorators.py", line 45, in wrapper
  File "dvc\stage\decorators.py", line 36, in rwlocked
  File "funcy\decorators.py", line 66, in __call__
  File "dvc\stage\__init__.py", line 533, in run
  File "funcy\decorators.py", line 45, in wrapper
  File "dvc\stage\decorators.py", line 36, in rwlocked
  File "funcy\decorators.py", line 66, in __call__
  File "dvc\stage\__init__.py", line 557, in _sync_import
  File "dvc\stage\imports.py", line 47, in sync_import
  File "dvc\dependency\repo.py", line 66, in download
  File "dvc\dependency\repo.py", line 107, in _get_used_and_obj
  File "contextlib.py", line 113, in __enter__
  File "dvc\external_repo.py", line 36, in external_repo
  File "dvc\external_repo.py", line 162, in _cached_clone
  File "funcy\decorators.py", line 45, in wrapper
  File "funcy\flow.py", line 274, in wrap_with
  File "funcy\decorators.py", line 66, in __call__
  File "dvc\external_repo.py", line 232, in _clone_default_branch
  File "dvc\scm.py", line 108, in clone
dvc.scm.CloneError: Failed to clone repo 'git@github.com:YourOrg/YourPrivateRepo.git' to 'C:\Users\user\AppData\Local\Temp\tmpbeadgsg7dvc-clone'
------------------------------------------------------------
2022-04-15 23:40:53,453 DEBUG: Analytics is enabled.
2022-04-15 23:40:53,456 DEBUG: Trying to spawn '['daemon', '-q', 'analytics', 'C:\\Users\\user\\AppData\\Local\\Temp\\tmpnnqcpnag']'
2022-04-15 23:40:53,461 DEBUG: Spawned '['daemon', '-q', 'analytics', 'C:\\Users\\user\\AppData\\Local\\Temp\\tmpnnqcpnag']'