Use the [Gemini/Google AI Studio](https://docs.litellm.ai/docs/providers/gemini) with Google Cloud Service Account credentials

[ikurian-coatue]

Hi,

Is there a way I can use the gemini/Google AI Studio provider with Google Cloud Service Account credentials?
For eg. using the google-genai package, I can do the below to authenticate using my google cloud service account credentials:

from google import genai
from google.oauth2.service_account import Credentials


PROJECT_ID = "my-project-id"
LOCATION = "global"

# Define the required scopes
scopes = [
    "https://www.googleapis.com/auth/generative-language",
    "https://www.googleapis.com/auth/cloud-platform",
]

# Load credentials from the service account file
credentials = Credentials.from_service_account_file(
    "vertex_service_acct.json", scopes=scopes
)

# Initialize the GenAI client with Vertex AI settings
client = genai.Client(
    vertexai=True,
    project=PROJECT_ID,
    location=LOCATION,
    credentials=credentials,
)
response = client.models.generate_content(model="gemini-2.5-flash-preview-05-20", contents="Why is the sky blue?")

Is there a way to do the same in litellm ? For additional context, I want to use the context caching utility that litellm provides for the gemini provider (but authenticate using my GCP service account credentials).

Thanks,
Issac