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::scheduler_v1::CloudSchedulerClient(
google::cloud::scheduler_v1::MakeCloudSchedulerConnection(options));
}
[[["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 2025-04-02 UTC."],[[["The latest release candidate version is 2.37.0-rc, and a range of previous versions are also available, from 2.36.0 down to 2.11.0."],["Client libraries typically use Application Default Credentials for Google Cloud Services authentication, but this can be overridden if needed."],["You can override the default credentials by using the `UnifiedCredentialsOption` and explicitly loading a service account key file."],["The provided example demonstrates how to load a service account key file to override authentication credentials, using the `MakeServiceAccountCredentials` function."],["Refer to the \"Best practices for managing service account keys\" guide and \"Authentication Components\" for additional details on credentials management and factory functions."]]],[]]
