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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 2025-04-09 UTC."],[[["This document provides version-specific documentation for overriding authentication in the C++ Cloud Scheduler client library, ranging from version 2.11.0 to the latest release candidate 2.37.0-rc."],["The C++ client libraries typically use Application Default Credentials (ADC) for authentication with Google Cloud Services, but you can override this default when needed."],["To override default credentials, you can utilize the `UnifiedCredentialsOption` and, as an example, can explicitly load a service account key file."],["For detailed information on managing service account keys, refer to the \"Best practices for managing service account keys\" guide provided by Google Cloud."],["The Authentication Components documentation provides comprehensive details on the factory functions used to create `google::cloud::Credentials` objects for the C++ client."]]],[]]
