Authentication issues when using AI Studio rather than vertex ai

[liamloft]

I updated the initialization block in agent.py to catch DefaultCredentialsError and fall back
to Google AI Studio:

try:                                                                                               
    _, project_id = google.auth.default()                                                          
    os.environ["GOOGLE_CLOUD_PROJECT"] = project_id or ""                                          
    os.environ["GOOGLE_CLOUD_LOCATION"] = "global"                                                 
    os.environ["GOOGLE_GENAI_USE_VERTEXAI"] = "True"                                               
except DefaultCredentialsError:                                                                    
    # Use Google AI Studio (expects GEMINI_API_KEY or GOOGLE_API_KEY environment variables)        
    os.environ["GOOGLE_GENAI_USE_VERTEXAI"] = "False"                                              

Because GOOGLE_GENAI_USE_VERTEXAI is set to "False" , the google-adk framework uses Google AI
Studio endpoints and authenticates successfully using the GEMINI_API_KEY present in your shell
environment.

[meteatamel]

@liamloft Which codelab are you referring to?

[meteatamel]

Please reopen with the codelab link