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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::securesourcemanager_v1::SecureSourceManagerClient( google::cloud::securesourcemanager_v1:: MakeSecureSourceManagerConnection(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 different versions of the SecureSourceManager, ranging from version 2.18.0 up to the latest release candidate, 2.37.0-rc."],["By default, the client libraries use Application Default Credentials for Google Cloud Services, but you can override this by providing the UnifiedCredentialsOption."],["You can override the default credentials by loading a service account key file, as demonstrated in the provided code example that utilizes the `UnifiedCredentialsOption` and `MakeServiceAccountCredentials`."],["The best practices guide for managing service account keys, as well as the Authentication Components section, offer further details on credential management and the creation of `google::cloud::Credentials` objects."]]],[]]
