require 'gemini-ai' # With an API key client = Gemini.new( credentials: { service: 'generative-language-api', api_key: ENV['GOOGLE_API_KEY'] }, options: { model: 'gemini-pro', server_sent_events: true } ) # With a Service Account Credentials File client = Gemini.new( credentials: { service: 'vertex-ai-api', file_path: 'google-credentials.json', region: 'us-east4' }, options: { model: 'gemini-pro',