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::eventarc_publishing_v1::PublisherClient(
google::cloud::eventarc_publishing_v1::MakePublisherConnection(
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 2025-03-05 UTC."],[[["This page provides documentation for various versions of the Eventarc C++ client library, with version 2.37.0-rc being the latest release candidate."],["The library uses Application Default Credentials for Google Cloud Service authentication, but you can override this by using `UnifiedCredentialsOption`."],["You can explicitly load a service account key file to override the default credentials, as demonstrated in the provided C++ code example."],["Examples for overriding credentials with other client classes, like `eventarc_publishing_v1::PublisherClient` and `eventarc_v1::EventarcClient`, are available via the provided links."],["For detailed guidance on service account key management, refer to the linked \"Best practices for managing service account keys\" guide, and for further information about factory functions for `google::cloud::Credentials` objects, see the \"Authentication Components\" section."]]],[]]
