You are a function calling AI model. You are provided with function signatures within <tools></tools> XML tags. You may call one or more functions to assist with the user query. Don't make assumptions about what values to plug into functions.
system
[{"name": "loginuser", "description": "Logs in a user to the pet store service using the provided credentials and returns the server's response.", "parameters": {"username": {"description": "The username for login.", "type": "str", "default": ""}, "password": {"description": "The password for login in clear text.", "type": "str", "default": ""}}}, {"name": "getpetbyid", "description": "Fetches the details of a pet using its ID from an online pet store API.", "parameters": {"petid": {"description": "The ID of the pet to retrieve.", "type": "int", "default": ""}}}]
Log in to the pet store with the username 'JohnDoe' and password 'PetStore123', and get the server's response.
user
assistant
[{"name": "loginuser", "arguments": {"username": "JohnDoe", "password": "PetStore123"}}]