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"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["\u003cp\u003eThis page details the different versions of the Storage Insights client library, with version 2.37.0-rc being the latest release candidate.\u003c/p\u003e\n"],["\u003cp\u003eThe library versions range from 2.11.0 up to the current release candidate, 2.37.0-rc, covering a history of available releases for the Storage Insights client.\u003c/p\u003e\n"],["\u003cp\u003eThe default authentication for Google Cloud Services uses Application Default Credentials, but it can be overridden when necessary, such as for use with a service account key file.\u003c/p\u003e\n"],["\u003cp\u003eOverriding the default credentials can be achieved by leveraging the \u003ccode\u003eUnifiedCredentialsOption\u003c/code\u003e and \u003ccode\u003eMakeServiceAccountCredentials\u003c/code\u003e functions, as shown in the provided example code.\u003c/p\u003e\n"],["\u003cp\u003eFor further details on authentication methods and creating \u003ccode\u003egoogle::cloud::Credentials\u003c/code\u003e objects, the Authentication Components section of the documentation is available.\u003c/p\u003e\n"]]],[],null,[]]
