Fix pylint warnings

Summary

Addresses #240 (closed)
Four pylint warnings are now ignored, one probable bug fixed

Focus

Are any of the warnings now marked as false positive in fact true positives?

Test Environment

Does the pylint job in the pipeline succeed?

Check List for the Author

• All automated tests pass
• Reference related issues
• Up-to-date CHANGELOG.md (or not necessary)
• Appropriate user and developer documentation (or not necessary)
• Annotations in code (Gitlab comments)

Check List for the Reviewer

• I understand the intent of this MR
• All automated tests pass
• Up-to-date CHANGELOG.md (or not necessary)
• Appropriate user and developer documentation (or not necessary)
• The test environment setup works and the intended behavior is reproducible in the test environment
• In-code documentation and comments are up-to-date.
• Check: Are there specifications? Are they satisfied?

src/linkahead/connection/connection.py

@@ -47,7 +47,7 @@ from ..exceptions import (ConfigurationError, HTTPClientError,
                           LoginFailedError)
 
 try:
-    from ..version import version
+    from ..version import version               # pylint: disable=import-error
 except ModuleNotFoundError:
     version = "uninstalled"
 
@@ -56,11 +56,12 @@ from .interface import CaosDBHTTPResponse, CaosDBServerConnection
 from .utils import make_uri_path, urlencode
 
 from typing import TYPE_CHECKING
+from .authentication.interface import CredentialsAuthenticator
 if TYPE_CHECKING:
     from typing import Optional, Any, Iterator, Union
     from requests.models import Response
-    from ssl import _SSLMethod
-    from .authentication.interface import AbstractAuthenticator, CredentialsAuthenticator
+    from ssl import _SSLMethod              # pylint: disable=no-name-in-module
+    from .authentication.interface import AbstractAuthenticator
 
 
 _LOGGER = logging.getLogger(__name__)
@@ -777,4+778,4 @@
         if self._authenticator._credentials_provider is None:
             raise ValueError(
                 "No credentials provider set. Please call configure_connection() first.")
         return self._authenticator._credentials_provider.username

[I. Nüske]

This is the function where CredentialsAuthenticator is used, in Line 777: assert isinstance(self._authenticator, CredentialsAuthenticator)