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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::deploy_v1::CloudDeployClient( google::cloud::deploy_v1::MakeCloudDeployConnection(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 available is 2.37.0-rc, with a variety of previous versions listed, ranging down to 2.11.0."],["The client libraries typically use Application Default Credentials for authentication with Google Cloud Services, but this can be overridden."],["You can override default authentication by using `UnifiedCredentialsOption`, such as loading a service account key file, as demonstrated in the provided code example."],["The example code demonstrates how to explicitly load a service account key file, but users are encouraged to review the guide for best practices in managing service account keys."],["For further information about creating `google::cloud::Credentials` objects, refer to the Authentication Components section in the documentation."]]],[]]
