Add unit tests for authentication and webhook parsing

- Implement tests for basic and bearer authentication headers in `test_auth.py`.
- Create tests for the `EasybillWebhookParser` in `test_webhooks.py`, covering JSON and form-encoded payloads, as well as a generic parse and acknowledgement method.

generated/async/docs/LoginSecurity.md

@@ -0,0 +1,32 @@
+# LoginSecurity
+
+This object is only displayed if your request the login resource as an admin. Otherwise this property will be null.
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**two_factor_enabled** | **bool** | Shows if the login has two factor enabled for the login process | [optional] [readonly] [default to False]
+**recovery_codes_enabled** | **bool** | Shows if the login has recovery codes enabled to bypass two factor | [optional] [readonly] [default to False]
+**notify_on_new_login_enabled** | **bool** | Shows if the login has enabled to be notified if a new login is made from an unknown device. | [optional] [readonly] [default to True]
+
+## Example
+
+```python
+from easybill_generated_async.models.login_security import LoginSecurity
+
+# TODO update the JSON string below
+json = "{}"
+# create an instance of LoginSecurity from a JSON string
+login_security_instance = LoginSecurity.from_json(json)
+# print the JSON string representation of the object
+print(LoginSecurity.to_json())
+
+# convert the object into a dict
+login_security_dict = login_security_instance.to_dict()
+# create an instance of LoginSecurity from a dict
+login_security_from_dict = LoginSecurity.from_dict(login_security_dict)
+```
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+