Unable to determine the correct location and variable name for inserting the Gemini 2.0 API key in the project configuration.
To Reproduce

Attempt to integrate Gemini 2.0 API
Search through configuration files
Unable to identify correct key insertion point
Experiencing configuration uncertainty

Additional Details

Specific questions:

Where should the Gemini 2.0 API key be placed?
What is the exact variable name for the API key?