Unless otherwise configured, the client libraries use Application Default Credentials to authenticate with Google Cloud Services. While this works for most applications, in some cases you may need to override this default. You can do so by providing the UnifiedCredentialsOption The following example shows how to explicitly load a service account key file:
[](std::string const& keyfile) {
auto is = std::ifstream(keyfile);
is.exceptions(std::ios::badbit); // Minimal error handling in examples
auto contents = std::string(std::istreambuf_iterator<char>(is.rdbuf()), {});
auto options =
google::cloud::Options{}.set<google::cloud::UnifiedCredentialsOption>(
google::cloud::MakeServiceAccountCredentials(contents));
return google::cloud::billing_budgets_v1::BudgetServiceClient(
google::cloud::billing_budgets_v1::MakeBudgetServiceConnection(
options));
}
Follow these links to find examples for other *Client classes:
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-03-05 UTC."],[[["This document provides a list of C++ client library versions for Google Cloud Billing, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc, along with the ability to navigate to the documentation for each version."],["The primary focus is on how to override default authentication using `UnifiedCredentialsOption`, which is demonstrated via a code snippet showing how to load a service account key file, in order to have custom credentials."],["Examples are provided for overriding authentication in `BudgetServiceClient`, `CloudBillingClient`, and `CloudCatalogClient` classes within the billing library, with the document recommending best practices for managing service account keys."],["The document refers users to another resource called \"Authentication Components\" for more details on creating `google::cloud::Credentials` objects and is linked for easy access."]]],[]]