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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::privateca_v1::CertificateAuthorityServiceClient( google::cloud::privateca_v1::MakeCertificateAuthorityServiceConnection( 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."],[[["This page provides documentation for various versions of the `privateca-override-authentication`, ranging from version 2.11.0 to the latest release candidate 2.37.0-rc."],["Client libraries typically use Application Default Credentials for Google Cloud service authentication, but the provided content explains how to override these default settings."],["The `UnifiedCredentialsOption` is the key component to override default authentication, and the document illustrates using a service account key file as an example."],["The document highlights the importance of secure key management practices and directs users to the \"Best practices for managing service account keys\" guide."],["Additional information on creating `google::cloud::Credentials` objects can be found in the \"Authentication Components\" section."]]],[]]
