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::workflows_executions_v1::ExecutionsClient(
google::cloud::workflows_executions_v1::MakeExecutionsConnection(
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 document provides information on how to override the default Application Default Credentials (ADC) used by client libraries for authentication with Google Cloud Services."],["You can override the default credentials by providing the `UnifiedCredentialsOption`, which can be used to load a service account key file."],["The example demonstrates how to load a service account key file using `MakeServiceAccountCredentials`, with links to similar examples for `workflows_executions_v1::ExecutionsClient` and `workflows_v1::WorkflowsClient`."],["The document links to other helpful information, such as the best practices for managing service account keys and authentication components for creating `google::cloud::Credentials` objects."],["The page provides access to the documentation of various versions of the C++ Workflows API, including the most recent release candidate (2.37.0-rc), version 2.36.0, and then down to 2.11.0."]]],[]]
