[Feature Request]: Allow passing credentials at runtime in VertexAIVectorStore

[naseemshah]

Feature Description

Currently, the VertexAIVectorStore class requires credentials to be provided through a file path (credentials_path). This method may not be ideal in certain scenarios where credentials are available at runtime, such as in cloud environments where the credentials are automatically injected or managed through environment variables. It would be great if this class could also support passing credentials directly as a parameter (e.g., credentials=credentials), instead of being restricted to using the credentials_path.

from google.auth import credentials

credentials = service_account.Credentials.from_service_account_info("service account json string")

vector_store = VertexAIVectorStore(
    project_id=PROJECT_ID,
    region=REGION,
    index_id=vs_index.resource_name,
    endpoint_id=vs_endpoint.resource_name,
    gcs_bucket_name=GCS_BUCKET_NAME,
    credentials=credentials  # Pass credentials directly
)

Reason

No response

Value of Feature

No response