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::apigeeconnect_v1::ConnectionServiceClient(
google::cloud::apigeeconnect_v1::MakeConnectionServiceConnection(
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 latest release candidate version is 2.37.0-rc, and a list of versions ranging from 2.36.0 down to 2.11.0 are available."],["The client libraries use Application Default Credentials for authentication with Google Cloud Services, unless otherwise configured."],["Users can override the default authentication by providing the UnifiedCredentialsOption, which is shown in the example."],["An example code snippet demonstrates how to load a service account key file explicitly to override the default authentication."],["The Authentication Components page provides further details on creating `google::cloud::Credentials` objects."]]],[]]
