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::containeranalysis_v1::ContainerAnalysisClient(
google::cloud::containeranalysis_v1::MakeContainerAnalysisConnection(
options));
}
Follow these links to find examples for other *Client classes:
[[["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."],[[["The latest release candidate version is 2.37.0-rc, with the most recent stable release being version 2.36.0, and multiple other versions available down to 2.11.0."],["Client libraries typically use Application Default Credentials for authentication with Google Cloud Services, but this default behavior can be overridden if needed."],["The UnifiedCredentialsOption can be used to override default credentials, as shown in the example which loads credentials from a service account key file."],["Examples for other client classes such as `containeranalysis_v1::ContainerAnalysisClient` and `containeranalysis_v1::GrafeasClient` are provided."],["The best practices guide should be consulted for managing service account keys, while the Authentication Components section provides additional information about creating `google::cloud::Credentials` objects."]]],[]]
