fix: avoid duplicate input in basic auth (#894)

`_collect_input_fields` takes user input, we should only be calling it
once.
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----

> [!IMPORTANT]
> Fix duplicate input collection in `_handle_basic_auth` by reusing
`auth_config` in `add.py`.
> 
>   - **Behavior**:
> - In `_handle_basic_auth` in `add.py`, `_collect_input_fields` is now
called once and its result is reused for `auth_config` and
`field_inputs`.
>   - **Functions**:
> - `_handle_basic_auth` now stores the result of
`_collect_input_fields` in `auth_config` and reuses it, preventing
duplicate input collection.
> 
> <sup>This description was created by </sup>[<img alt="Ellipsis"
src="https://img.shields.io/badge/Ellipsis-blue?color=175173">](https://www.ellipsis.dev?ref=ComposioHQ%2Fcomposio&utm_source=github&utm_medium=referral)<sup>
for db48d78. It will automatically
update as commits are pushed.</sup>

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python/composio/cli/add.py

@@ -324,22 +324,21 @@ def _handle_basic_auth(
     labels: t.Optional[t.List] = None,
 ) -> None:
     """Handle basic auth."""
+    auth_config = _collect_input_fields(
+        fields=auth_scheme.fields,
+    )
     connection = entity.initiate_connection(
         app_name=app_name.lower(),
         auth_mode=auth_mode,
-        auth_config=_collect_input_fields(
-            fields=auth_scheme.fields,
-        ),
+        auth_config=auth_config,
         integration=integration,
         use_composio_auth=False,
         force_new_integration=True,
         labels=labels,
     )
     connection.save_user_access_data(
         client=client,
-        field_inputs=_collect_input_fields(
-            fields=auth_scheme.fields,
-        ),
+        field_inputs=auth_config,
         entity_id=entity.id,
     )
     click.echo(