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::redis_v1::CloudRedisClient(
google::cloud::redis_v1::MakeCloudRedisConnection(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 other versions range from 2.36.0 down to 2.11.0."],["Client libraries use Application Default Credentials for authentication with Google Cloud Services unless otherwise configured."],["You can override default credentials by using `UnifiedCredentialsOption`, such as loading a service account key file as demonstrated in the provided example."],["Refer to the \"Best practices for managing service account keys\" guide for more details on managing service account keys."],["For more information on creating `google::cloud::Credentials` objects, see the Authentication Components page."]]],[]]
