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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::vmwareengine_v1::VmwareEngineClient( google::cloud::vmwareengine_v1::MakeVmwareEngineConnection(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 2025-03-14 UTC."],[[["This page provides documentation for the VMware Engine C++ client library, spanning versions from 2.11.0 up to the latest release candidate, 2.37.0-rc."],["The library typically uses Application Default Credentials for authentication, but offers the flexibility to override these defaults."],["Authentication override is achievable by using the `UnifiedCredentialsOption`, such as explicitly loading a service account key file, illustrated in the code example."],["Users should refer to the \"Best practices for managing service account keys\" guide for comprehensive information on managing service account credentials."],["The \"Authentication Components\" link provides additional details on how to create `google::cloud::Credentials` objects using factory functions."]]],[]]