refactor: update skip_auth_auto_login behavior and update messaging timelines for removal

src/backend/base/langflow/services/auth/utils.py

@@ -32,7 +32,7 @@
 api_key_header = APIKeyHeader(name=API_KEY_NAME, scheme_name="API key header", auto_error=False)
 
 MINIMUM_KEY_LENGTH = 32
-AUTO_LOGIN_WARNING = "In v1.6 LANGFLOW_SKIP_AUTH_AUTO_LOGIN will be removed. Please update your authentication method."
+AUTO_LOGIN_WARNING = "In v2.0, LANGFLOW_SKIP_AUTH_AUTO_LOGIN will be removed. Please update your authentication method."
 AUTO_LOGIN_ERROR = (
     "Since v1.5, LANGFLOW_AUTO_LOGIN requires a valid API key. "
     "Set LANGFLOW_SKIP_AUTH_AUTO_LOGIN=true to skip this check. "

src/backend/base/langflow/services/settings/auth.py

@@ -28,17 +28,17 @@ class AuthSettings(BaseSettings):
     API_V1_STR: str = "/api/v1"
 
     AUTO_LOGIN: bool = Field(
-        default=True,  # TODO: Set to False in v1.6
+        default=True,  # TODO: Set to False in v2.0
         description=(
             "Enable automatic login with default credentials. "
             "SECURITY WARNING: This bypasses authentication and should only be used in development environments. "
-            "Set to False in production."
+            "Set to False in production. This will default to False in v2.0."
         ),
     )
     """If True, the application will attempt to log in automatically as a super user."""
-    skip_auth_auto_login: bool = True
+    skip_auth_auto_login: bool = False
     """If True, the application will skip authentication when AUTO_LOGIN is enabled.
-    This will be removed in v1.6"""
+    This will be removed in v2.0"""
 
     ENABLE_SUPERUSER_CLI: bool = Field(
         default=True,

src/backend/tests/unit/api/v1/test_mcp_projects.py

@@ -678,5 +678,5 @@ async def test_mcp_longterm_token_fails_without_superuser():
 
     # Now attempt to create long-term token -> expect HTTPException 400
     async with get_db_service().with_session() as session:
-        with pytest.raises(HTTPException):
+        with pytest.raises(HTTPException, match="Auto login required to create a long-term token"):
             await create_user_longterm_token(session)

src/backend/tests/unit/test_load_components.py

@@ -3,7 +3,6 @@
 import time
 
 import pytest
-
 from langflow.interface.components import aget_all_types_dict, import_langflow_components
 from langflow.services.settings.base import BASE_COMPONENTS_PATH