[Bug]: Groq models don't support Pydantic Message models

[andreakiro]

What happened?

Groq models are able to ingest messages in Python format but not with your Message Pydantic model

This works fine:

from litellm import completion
messages = [{ "content": "Hello, how are you?","role": "user"}]
completion(model="groq/llama-3.1-8b-instant", messages=messages)

This doesn't work:

from litellm import completion, Message
messages = [Message(content="Hello, how are you?", role="user")]
completion(model="groq/llama-3.1-8b-instant", messages=messages)

Relevant log output

litellm.exceptions.APIError: litellm.APIError: APIError: GroqException - Object of type Message is not JSON serializable

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