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, and the content details how to override authentication credentials for various client libraries."],["The documentation covers a range of versions from 2.11.0 up to the latest release candidate 2.37.0-rc, with each link leading to the respective version's documentation on how to override authentication credentials."],["Client libraries typically use Application Default Credentials for authentication, but this can be overridden by using the UnifiedCredentialsOption to load a service account key file."],["Examples for overriding authentication are provided for `containeranalysis_v1::ContainerAnalysisClient` and `containeranalysis_v1::GrafeasClient` in the context of version 2.14.0."],["The guide recommends reviewing the best practices for managing service account keys and the Authentication Components section for further information on creating `google::cloud::Credentials` objects."]]],[]]