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 2025-03-21 UTC."],[[["The webpage provides documentation for various versions of the C++ Access Approval client library, ranging from version 2.11.0 to 2.37.0-rc, with 2.37.0-rc being the latest release candidate."],["The client libraries, by default, use Application Default Credentials (ADC) for Google Cloud Services authentication, however there are methods for overriding this behavior."],["Users can override the default authentication by utilizing `UnifiedCredentialsOption` and can explicitly load a service account key file as demonstrated in the code example."],["The provided example focuses on overriding authentication through loading a service account key file, but users should refer to the \"Best practices for managing service account keys\" for detailed guidance."],["Additional information on creating `google::cloud::Credentials` objects can be found in the \"Authentication Components\" section of the documentation."]]],[]]
