feat: add login process in init command

lean/commands/init.py

@@ -17,6 +17,7 @@
 from click import command, option, Choice, confirm, prompt
 
 from lean.click import LeanCommand
+from lean.commands.login import get_credentials, validate_credentials, get_lean_config_credentials
 from lean.constants import DEFAULT_DATA_DIRECTORY_NAME, DEFAULT_LEAN_CONFIG_FILE_NAME
 from lean.container import container
 from lean.models.errors import MoreInfoError
@@ -128,6 +129,12 @@ def init(organization: Optional[str], language: Optional[str]) -> None:
     from shutil import copytree
     from zipfile import ZipFile
 
+    # Retrieve current credentials from the Lean CLI configuration
+    # If credentials are not available, prompt the user to provide them
+    current_user_id, current_api_token = get_lean_config_credentials()
+    user_id, api_token = get_credentials(current_user_id, current_api_token, False)
+    validate_credentials(user_id, api_token)
+
     # Select and set organization
 
     if organization is not None:

lean/commands/login.py

@@ -21,38 +21,71 @@
 from lean.components.api.api_client import APIClient
 
 
-@command(cls=LeanCommand)
-@option("--user-id", "-u", type=str, help="QuantConnect user id")
-@option("--api-token", "-t", type=str, help="QuantConnect API token")
-@option("--show-secrets", is_flag=True, show_default=True, default=False, help="Show secrets as they are input")
-def login(user_id: Optional[str], api_token: Optional[str], show_secrets: bool) -> None:
-    """Log in with a QuantConnect account.
+def get_lean_config_credentials() -> tuple[str, str]:
+    """Retrieve the QuantConnect credentials from the Lean CLI configuration.
 
-    If user id or API token is not provided an interactive prompt will show.
+    This function accesses the Lean CLI configuration manager to obtain the
+    stored user ID and API token. The credentials are retrieved from the
+    configuration settings managed by the Lean CLI.
 
-    Credentials are stored in ~/.lean/credentials and are removed upon running `lean logout`.
+    Returns:
+        tuple[str, str]: A tuple containing the user ID and API token as strings.
     """
+    cli_config_manager = container.cli_config_manager
+
+    user_id = cli_config_manager.user_id.get_value()
+    api_token = cli_config_manager.api_token.get_value()
+
+    return user_id, api_token
+
+
+def get_credentials(user_id: Optional[str], api_token: Optional[str], show_secrets: bool) -> tuple[str, str]:
+    """Fetch user credentials, prompting the user if necessary."""
     logger = container.logger
     credentials_storage = container.credentials_storage
+    current_user_id, current_api_token = get_lean_config_credentials()
 
     if user_id is None or api_token is None:
         logger.info("Your user id and API token are needed to make authenticated requests to the QuantConnect API")
         logger.info("You can request these credentials on https://www.quantconnect.com/account")
         logger.info(f"Both will be saved in {credentials_storage.file}")
 
     if user_id is None:
-        user_id = prompt("User id")
+        user_id = prompt("User id", current_user_id)
 
     if api_token is None:
-        api_token = logger.prompt_password("API token", hide_input=not show_secrets)
+        api_token = logger.prompt_password("API token", current_api_token, hide_input=not show_secrets)
+
+    return user_id, api_token
+
 
+def validate_credentials(user_id: str, api_token: str) -> None:
+    """Validate the user credentials by attempting to authenticate with the QuantConnect API."""
     container.api_client.set_user_token(user_id=user_id, api_token=api_token)
+
     if not container.api_client.is_authenticated():
-        raise MoreInfoError("Credentials are invalid. Please ensure your computer clock is correct, or try using another terminal, or enter API token manually instead of copy-pasting.",
-                            "https://www.lean.io/docs/v2/lean-cli")
+        raise MoreInfoError(
+            "Credentials are invalid. Please ensure your computer clock is correct, or try using another terminal, or enter API token manually instead of copy-pasting.",
+            "https://www.lean.io/docs/v2/lean-cli"
+        )
 
     cli_config_manager = container.cli_config_manager
     cli_config_manager.user_id.set_value(user_id)
     cli_config_manager.api_token.set_value(api_token)
 
-    logger.info("Successfully logged in")
+    container.logger.info("Successfully logged in")
+
+@command(cls=LeanCommand)
+@option("--user-id", "-u", type=str, help="QuantConnect user id")
+@option("--api-token", "-t", type=str, help="QuantConnect API token")
+@option("--show-secrets", is_flag=True, show_default=True, default=False, help="Show secrets as they are input")
+def login(user_id: Optional[str], api_token: Optional[str], show_secrets: bool) -> None:
+    """Log in with a QuantConnect account.
+
+    If user id or API token is not provided an interactive prompt will show.
+
+    Credentials are stored in ~/.lean/credentials and are removed upon running `lean logout`.
+    """
+
+    user_id, api_token = get_credentials(user_id, api_token, show_secrets)
+    validate_credentials(user_id, api_token)