Open scene file Test01. Find asset in scene named "Personality Manager". On personality manager object, find script compoennt "Gpt Communicator". In GPT communicator component, find API Key field. Copy your Open AI API Key into this field. If you do not have access to gpt-4, you will need to change Model field to "gpt-3.5-turbo", or something like that.
More/better instructions are on the way.
Relevant Medium article I wrote on the system: