fix(nhn): replace sys.exit with exceptions for token retrieval errors

prowler/providers/nhn/nhn_provider.py

@@ -1,4 +1,3 @@
-import sys
 from typing import Optional
 
 import requests
@@ -209,10 +208,10 @@ def setup_session(self) -> None:
                 logger.critical(
                     f"Failed to get token. Status: {response.status_code}, Body: {response.text}"
                 )
-                sys.exit(1)
+                raise ValueError("Failed to get NHN token")
         except Exception as e:
             logger.critical(f"[setup_session] Error: {e}")
-            sys.exit(1)
+            raise e
 
     @staticmethod
     def test_connection(

tests/providers/nhn/nhn_provider_test.py

@@ -62,14 +62,14 @@ def test_nhn_provider_init_token_fail(self, mock_post, mock_load_config):
         mock_post.return_value.status_code = 401
         mock_post.return_value.text = "Unauthorized"
 
-        provider = NhnProvider(
-            username="test_user",
-            password="test_pass",
-            tenant_id="tenant123",
-        )
+        with pytest.raises(ValueError) as exc_info:
+            NhnProvider(
+                username="test_user",
+                password="test_pass",
+                tenant_id="tenant123",
+            )
 
-        assert provider._token is None
-        assert provider.session is None
+        assert "Failed to get NHN token" in str(exc_info.value)
 
     @patch("prowler.providers.nhn.nhn_provider.requests")
     def test_test_connection_success(self, mock_requests):