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 version of the scheduler documentation is 2.37.0-rc, with various older versions available, ranging down to version 2.11.0."],["By default, client libraries use Application Default Credentials (ADC) for authentication with Google Cloud Services."],["You can override the default authentication credentials by using the `UnifiedCredentialsOption`, which allows you to specify alternative credentials like a service account key file."],["The provided code demonstrates how to explicitly load a service account key file using `UnifiedCredentialsOption` and `MakeServiceAccountCredentials`."],["For in-depth information on creating `google::cloud::Credentials` objects and managing service account keys, refer to the Authentication Components documentation and the service account key management guide."]]],[]]
