Function: trading_login
Description: This tool belongs to the trading system, which allows users to trade stocks, manage their account, and view stock information. Tool description: Handle user login.
Parameters:
type: dict
properties: username: type: string
description: Username for authentication.
password: type: string
description: Password for authentication. 
required: username, password
Response:
type: dict
properties: status: type: string
description: Login status message.