ModifyMessage failed with error code 400, message: Unknown parameter

[Ahmadhegavf]

Bug Description:
The ModifyMessage function from the go-openai library expects a parameter metadata of type map[string]any, but the API it interfaces with, specifically the Modify Message endpoint, requires the metadata to be wrapped in a JSON object with a field named "metadata". This discrepancy causes the API call to fail due to an unknown parameter.

To Reproduce:
Call the ModifyMessage function with a non-empty metadata parameter.

Expected Behavior:
The method should serialize the metadata into a JSON object with a field named "metadata" and send it to the API, aligning with the API's expectations.

Environment:

• go-openai version: v1.120.3
• Go version: go1.21.3
• OpenAI API version: v1
• OS: Ubuntu 20.04

[qhenkart]

I just ran into this as well and you was going to make an issue. I can confirm this report