Support for Service Account (from Google Vertex AI) to access Gemini services

[sree1658]

Hi Hadley,

We attempted using ellmer library functions to access Gemini API services with service account json key file. We also found another library (gemini.R maintained by Jinhwan Kim) https://github.com/jhk0530/gemini.R which has support for Vertex platform from Google

Given a Service account Key from Google vertex ai platform,

{
"type": "service_account",
"project_id": "my-project-id",
"private_key_id": "someprivatekeyid",
"private_key": "...PRIVATE_KEY...",
"client_email": "[email protected]",
"client_id": "my-client-id.apps.googleusercontent.com",
"auth_uri": "https://accounts.google.com/o/oauth2/auth",
"token_uri": "https://oauth2.googleapis.com/token",
"auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
"client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/my-service-account my-project-id.iam.gserviceaccount.com"
}

Could you please enable support for Service account (from google vertex ai platform) in ellmer library

Thanks
Sreeram R