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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::automl_v1::AutoMlClient( google::cloud::automl_v1::MakeAutoMlConnection(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 2025-03-21 UTC."],[[["This document provides version-specific documentation for the C++ AutoML client library, with versions ranging from 2.11.0 to the latest release candidate, 2.37.0-rc."],["The primary focus of the content is on how to override the default authentication credentials for Google Cloud services when using the client library."],["Users can override authentication by using the `UnifiedCredentialsOption` and providing a service account key file, as demonstrated in the provided code example."],["Examples are given for `automl_v1::AutoMlClient` and `automl_v1::PredictionServiceClient` to help users override authentication in other `*Client` classes."],["It's crucial to review the best practices guide for managing service account keys to ensure security when overriding default credentials."]]],[]]
