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::accessapproval_v1::AccessApprovalClient(
google::cloud::accessapproval_v1::MakeAccessApprovalConnection(
options));
}
[[["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."],[[["The webpage provides documentation for various versions of the Access Approval C++ client library, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc."],["The latest version is 2.37.0-rc, but there are over 20 prior releases listed, each linked to its respective documentation for Access Approval authentication."],["The documentation explains how to override the default authentication credentials used by the client libraries, which typically rely on Application Default Credentials."],["Overriding default credentials involves using `UnifiedCredentialsOption` and is shown with an example that loads credentials from a service account key file, with a best practices link provided for more secure credential management."],["The page offers a \"See Also\" section that directs users to additional information on Authentication Components and the creation of `google::cloud::Credentials` objects."]]],[]]