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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 2025-03-21 UTC."],[[["The latest version of the scheduler documentation is 2.37.0-rc, with previous versions available ranging from 2.36.0 down to 2.11.0."],["The documentation primarily focuses on how to override the default authentication credentials used by client libraries when interacting with Google Cloud Services."],["Overriding default credentials can be accomplished by using the `UnifiedCredentialsOption` and providing a service account key file, as demonstrated in the provided code example."],["The example uses `MakeServiceAccountCredentials` but the user should consult best practices for managing service account keys."],["The user may find more information on the factory functions to create `google::cloud::Credentials` in the documentation."]]],[]]
