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 2025-04-17 UTC."],[[["This webpage provides documentation for the Eventarc C++ client library, specifically focusing on versions ranging from 2.11.0 to the latest release candidate, 2.37.0-rc."],["The content details how to override the default Application Default Credentials (ADC) when authenticating with Google Cloud Services by utilizing the `UnifiedCredentialsOption`."],["An example is given demonstrating how to load a service account key file and how to implement `MakePublisherConnection` function with the loaded key."],["The page provides links to examples for other client classes such as `eventarc_publishing_v1::PublisherClient` and `eventarc_v1::EventarcClient`, showing how to implement the credentials."],["It emphasizes the importance of consulting the \"Best practices for managing service account keys\" guide for more detailed information on managing authentication."]]],[]]
