Add import for get_environment_variable and json module

* **d2x/auth/sf/login_url.py**
  - Add import for `get_environment_variable` from `d2x.api.gh`.

* **tests/test_auth_url.py**
  - Add import for `json` module.

d2x/auth/sf/login_url.py

@@ -6,7 +6,7 @@
 from d2x.base.types import CLIOptions
 from typing import Optional
 from d2x.auth.sf.auth_url import parse_sfdx_auth_url
-from d2x.api.gh import get_environment_variable  # Add this import
+from d2x.api.gh import get_environment_variable
 
 
 def generate_login_url(instance_url: str, access_token: str) -> str:

tests/test_auth_url.py

@@ -4,6 +4,7 @@
 from d2x.models.sf.org import SalesforceOrgInfo
 from d2x.base.types import CLIOptions
 from d2x.models.sf.auth import AuthInfo
+import json
 
 class TestExchangeToken(unittest.TestCase):
     @patch("d2x.auth.sf.auth_url.set_environment_variable")