Handle already logged in state

Author: alejsdev

src/fastapi_cloud_cli/commands/login.py

@@ -8,7 +8,7 @@
 
 from fastapi_cloud_cli.config import Settings
 from fastapi_cloud_cli.utils.api import APIClient
-from fastapi_cloud_cli.utils.auth import AuthConfig, write_auth_config
+from fastapi_cloud_cli.utils.auth import AuthConfig, is_logged_in, write_auth_config
 from fastapi_cloud_cli.utils.cli import get_rich_toolkit, handle_http_errors
 
 logger = logging.getLogger(__name__)
@@ -72,10 +72,36 @@ def _fetch_access_token(client: httpx.Client, device_code: str, interval: int) -
     return response_data.access_token
 
 
+def _verify_token(client: httpx.Client) -> tuple[bool, str | None]:
+    try:
+        response = client.get("/users/me")
+        response.raise_for_status()
+        data = response.json()
+        return True, data.get("email")
+    except httpx.HTTPStatusError as e:
+        if e.response.status_code in (401, 403):
+            return False, None
+        raise
+    except Exception:
+        return False, None
+
+
 def login() -> Any:
     """
     Login to FastAPI Cloud. 🚀
     """
+    if is_logged_in():
+        with APIClient() as client:
+            is_valid, email = _verify_token(client)
+
+            if is_valid:
+                with get_rich_toolkit(minimal=True) as toolkit:
+                    toolkit.print(f"Already logged in as [bold]{email}[/bold]")
+                    toolkit.print(
+                        "Run [bold]fastapi logout[/bold] first if you want to switch accounts."
+                    )
+                return
+
     with get_rich_toolkit() as toolkit, APIClient() as client:
         toolkit.print_title("Login to FastAPI Cloud", tag="FastAPI")