加入对Google Vertex Gemini API的支持

[KenXiao1]

我试着通过openai compatible调用vertex api，但我无法在desktop配置authentication
{
"error": {
"code": 401,
"message": "Request is missing required authentication credential. Expected OAuth 2 access token, login cookie or other valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project.",
"status": "UNAUTHENTICATED",
"details": [
{
"@type": "type.googleapis.com/google.rpc.ErrorInfo",
"reason": "CREDENTIALS_MISSING",
"domain": "googleapis.com",
"metadata": {
"service": "aiplatform.googleapis.com",
"method": "google.cloud.aiplatform.v1beta1.EndpointService.GetEndpoint"
}
}
]
}
}