/*!
@page bigquery-override-authentication How to Override the Authentication Credentials

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](@ref google::cloud::UnifiedCredentialsOption)
The following example shows how to explicitly load a service account key file:

<!-- inject-service-account-snippet-start -->
@snippet analytics_hub_client_samples.cc with-service-account

Follow these links to find examples for other \c *Client classes:

- [\c bigquery_analyticshub_v1::AnalyticsHubServiceClient](@ref bigquery_analyticshub_v1::AnalyticsHubServiceClient-service-account-snippet)
- [\c bigquery_biglake_v1::MetastoreServiceClient](@ref bigquery_biglake_v1::MetastoreServiceClient-service-account-snippet)
- [\c bigquery_connection_v1::ConnectionServiceClient](@ref bigquery_connection_v1::ConnectionServiceClient-service-account-snippet)
- [\c bigquery_datapolicies_v1::DataPolicyServiceClient](@ref bigquery_datapolicies_v1::DataPolicyServiceClient-service-account-snippet)
- [\c bigquery_datatransfer_v1::DataTransferServiceClient](@ref bigquery_datatransfer_v1::DataTransferServiceClient-service-account-snippet)
- [\c bigquery_migration_v2::MigrationServiceClient](@ref bigquery_migration_v2::MigrationServiceClient-service-account-snippet)
- [\c bigquery_reservation_v1::ReservationServiceClient](@ref bigquery_reservation_v1::ReservationServiceClient-service-account-snippet)
- [\c bigquery_storage_v1::BigQueryReadClient](@ref bigquery_storage_v1::BigQueryReadClient-service-account-snippet)
- [\c bigquery_storage_v1::BigQueryWriteClient](@ref bigquery_storage_v1::BigQueryWriteClient-service-account-snippet)

<!-- inject-service-account-snippet-end -->

Keep in mind that we chose this as an example because it is relatively easy to
understand. Consult the [Best practices for managing service account keys]
guide for more details.

@see @ref guac - for more information on the factory functions to create
`google::cloud::Credentials` objects.

[Best practices for managing service account keys]: https://cloud.google.com/iam/docs/best-practices-for-managing-service-account-keys
[Application Default Credentials]: https://cloud.google.com/docs/authentication#adc

*/

// <!-- inject-authentication-pages-start -->

/*! @page bigquery_analyticshub_v1::AnalyticsHubServiceClient-service-account-snippet Override bigquery_analyticshub_v1::AnalyticsHubServiceClient Authentication Defaults

@snippet google/cloud/bigquery/analyticshub/v1/samples/analytics_hub_client_samples.cc with-service-account

*/

/*! @page bigquery_biglake_v1::MetastoreServiceClient-service-account-snippet Override bigquery_biglake_v1::MetastoreServiceClient Authentication Defaults

@snippet google/cloud/bigquery/biglake/v1/samples/metastore_client_samples.cc with-service-account

*/

/*! @page bigquery_connection_v1::ConnectionServiceClient-service-account-snippet Override bigquery_connection_v1::ConnectionServiceClient Authentication Defaults

@snippet google/cloud/bigquery/connection/v1/samples/connection_client_samples.cc with-service-account

*/

/*! @page bigquery_datapolicies_v1::DataPolicyServiceClient-service-account-snippet Override bigquery_datapolicies_v1::DataPolicyServiceClient Authentication Defaults

@snippet google/cloud/bigquery/datapolicies/v1/samples/data_policy_client_samples.cc with-service-account

*/

/*! @page bigquery_datatransfer_v1::DataTransferServiceClient-service-account-snippet Override bigquery_datatransfer_v1::DataTransferServiceClient Authentication Defaults

@snippet google/cloud/bigquery/datatransfer/v1/samples/data_transfer_client_samples.cc with-service-account

*/

/*! @page bigquery_migration_v2::MigrationServiceClient-service-account-snippet Override bigquery_migration_v2::MigrationServiceClient Authentication Defaults

@snippet google/cloud/bigquery/migration/v2/samples/migration_client_samples.cc with-service-account

*/

/*! @page bigquery_reservation_v1::ReservationServiceClient-service-account-snippet Override bigquery_reservation_v1::ReservationServiceClient Authentication Defaults

@snippet google/cloud/bigquery/reservation/v1/samples/reservation_client_samples.cc with-service-account

*/

/*! @page bigquery_storage_v1::BigQueryReadClient-service-account-snippet Override bigquery_storage_v1::BigQueryReadClient Authentication Defaults

@snippet google/cloud/bigquery/storage/v1/samples/bigquery_read_client_samples.cc with-service-account

*/

/*! @page bigquery_storage_v1::BigQueryWriteClient-service-account-snippet Override bigquery_storage_v1::BigQueryWriteClient Authentication Defaults

@snippet google/cloud/bigquery/storage/v1/samples/bigquery_write_client_samples.cc with-service-account

*/
// <!-- inject-authentication-pages-end -->
