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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::storageinsights_v1::StorageInsightsClient( google::cloud::storageinsights_v1::MakeStorageInsightsConnection( 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 numerous other versions, down to 2.11.0, also listed for reference."],["The client libraries, by default, authenticate with Google Cloud Services using Application Default Credentials, unless otherwise specified."],["You can override the default authentication method by using the `UnifiedCredentialsOption`, for instance, to explicitly load a service account key file."],["The provided code snippet illustrates how to load a service account key file using `UnifiedCredentialsOption`, serving as a simplified example for understanding the process."],["For additional details on managing service account keys and the creation of `google::cloud::Credentials` objects, consult the linked documentation on best practices and authentication components."]]],[]]
