Invalid response received: Please use a valid role such as user or model.

To fix the 400 status error with the message "Please use a valid role: user, model." in the Google API, you need to ensure that the role parameter in your request is correctly set. Here are the steps to resolve this issue:

Correct the Role Parameter

• Use either user or model as the value for the role parameter.

Verify Request Parameters

• Double-check that all required parameters are included and correctly formatted in the request.

• Ensure there are no typos or invalid characters in the request.

Check API Documentation

• Refer to the API documentation to confirm the acceptable values and formats for the role parameter.

By making these adjustments, you should be able to resolve the 400 Bad Request error and successfully complete your API request.