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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 information on how to override the default authentication credentials used by the client libraries when interacting with Google Cloud Services."],["The latest release candidate is version 2.37.0-rc, with many prior versions available down to 2.11.0."],["Users can override default credentials by utilizing the `UnifiedCredentialsOption` and providing credentials, such as a service account key file."],["The provided code example demonstrates how to explicitly load a service account key file to override the default authentication."],["Additional examples are provided for `automl_v1::AutoMlClient` and `automl_v1::PredictionServiceClient` classes, with links to the documentation for these examples."]]],[]]
