Merchant API code sample to link a GBP account.

### Java

    // Copyright 2025 Google LLC

    // Licensed under the Apache License, Version 2.0 (the "License");
    // you may not use this file except in compliance with the License.
    // You may obtain a copy of the License at
    //
    //     https://www.apache.org/licenses/LICENSE-2.0
    //
    // Unless required by applicable law or agreed to in writing, software
    // distributed under the License is distributed on an "AS IS" BASIS,
    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    // See the License for the specific language governing permissions and
    // limitations under the License.

    package shopping.merchant.samples.accounts.gbpaccounts.v1;

    import com.google.api.gax.core.FixedCredentialsProvider;
    import com.google.auth.oauth2.GoogleCredentials;
    import com.google.shopping.merchant.accounts.v1.AccountName;
    import com.google.shopping.merchant.accounts.v1.GbpAccountsServiceClient;
    import com.google.shopping.merchant.accounts.v1.GbpAccountsServiceSettings;
    import com.google.shopping.merchant.accounts.v1.LinkGbpAccountRequest;
    import shopping.merchant.samples.utils.Authenticator;
    import shopping.merchant.samples.utils.Config;

    /** This class demonstrates how to link the specified merchant to a GBP account */
    public class LinkGbpAccountSample {

      public static void linkGbpAccount(Config config, String gbpEmail) throws Exception {

        // Obtains OAuth token based on the user's configuration.
        GoogleCredentials credential = new Authenticator().authenticate();

        // Creates service settings using the credentials retrieved above.
        GbpAccountsServiceSettings gbpAccountsServiceSettings =
            GbpAccountsServiceSettings.newBuilder()
                .setCredentialsProvider(FixedCredentialsProvider.create(credential))
                .build();

        // Calls the API and catches and prints any network failures/errors.
        try (GbpAccountsServiceClient gbpAccountsServiceClient =
            GbpAccountsServiceClient.create(gbpAccountsServiceSettings)) {
          String accountId = config.getAccountId().toString();
          // Creates parent to identify the omnichannelSetting from which to list all Lfp Providers.
          String parent = AccountName.newBuilder().setAccount(accountId).build().toString();

          LinkGbpAccountRequest request =
              LinkGbpAccountRequest.newBuilder().setParent(parent).setGbpEmail(gbpEmail).build();

          System.out.println("Sending link GBP account request:");
          // Empty response returned on success.
          gbpAccountsServiceClient.linkGbpAccount(request);
          System.out.println(String.format("Successfully linked to GBP account: %s", gbpEmail));
        } catch (Exception e) {
          System.out.println("An error has occured: ");
          System.out.println(e);
        }
      }

      public static void main(String[] args) throws Exception {
        Config config = Config.load();

        // The email address of the Business Profile account.
        String gbpEmail = "{GBP_EMAIL}";

        linkGbpAccount(config, gbpEmail);
      }
    }

### PHP

    <?php
    /**
     * Copyright 2025 Google LLC
     *
     * Licensed under the Apache License, Version 2.0 (the "License");
     * you may not use this file except in compliance with the License.
     * You may obtain a copy of the License at
     *
     *     https://www.apache.org/licenses/LICENSE-2.0
     *
     * Unless required by applicable law or agreed to in writing, software
     * distributed under the License is distributed on an "AS IS" BASIS,
     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     * See the License for the specific language governing permissions and
     * limitations under the License.
     */
    require_once __DIR__ . '/../../../../vendor/autoload.php';
    require_once __DIR__ . '/../../../Authentication/Authentication.php';
    require_once __DIR__ . '/../../../Authentication/Config.php';

    use Google\ApiCore\ApiException;
    use Google\Shopping\Merchant\Accounts\V1\Client\GbpAccountsServiceClient;
    use Google\Shopping\Merchant\Accounts\V1\LinkGbpAccountRequest;

    /**
     * This class demonstrates how to link the specified merchant to a GBP account.
     */
    class LinkGbpAccountSample
    {
        /**
         * A helper function to create the parent string.
         *
         * @param string $accountId The account ID.
         *
         * @return string The parent has the format: `accounts/{account_id}`
         */
        private static function getParent(string $accountId): string
        {
            return sprintf('accounts/%s', $accountId);
        }

        /**
         * Links the specified merchant to a GBP account.
         *
         * @param array $config The configuration data for authentication and account ID.
         * @param string $gbpEmail The email address of the Business Profile account.
         *
         * @return void
         */
        public static function linkGbpAccount(array $config, string $gbpEmail): void
        {
            // Gets the OAuth credentials to make the request.
            $credentials = Authentication::useServiceAccountOrTokenFile();

            // Creates options config containing credentials for the client to use.
            $options = ['credentials' => $credentials];

            // Creates a client.
            $gbpAccountsServiceClient = new GbpAccountsServiceClient($options);

            // Creates the parent account name to identify the merchant.
            $parent = self::getParent($config['accountId']);

            // Creates the request to link the GBP account.
            $request = new LinkGbpAccountRequest([
                'parent' => $parent,
                'gbp_email' => $gbpEmail
            ]);

            // Calls the API and catches and prints any network failures/errors.
            try {
                printf("Sending link GBP account request:%s", PHP_EOL);
                // An empty response is returned on success.
                $gbpAccountsServiceClient->linkGbpAccount($request);
                printf("Successfully linked to GBP account: %s%s", $gbpEmail, PHP_EOL);
            } catch (ApiException $e) {
                printf("An error has occurred: %s%s", $e->getMessage(), PHP_EOL);
            }
        }

        /**
         * Helper to execute the sample.
         *
         * @return void
         */
        public function callSample(): void
        {
            $config = Config::generateConfig();

            // The email address of the Business Profile account.
            $gbpEmail = '{GBP_EMAIL}';

            self::linkGbpAccount($config, $gbpEmail);
        }
    }

    // Runs the script.
    $sample = new LinkGbpAccountSample();
    $sample->callSample();

### Python

    # -*- coding: utf-8 -*-
    # Copyright 2025 Google LLC
    #
    # Licensed under the Apache License, Version 2.0 (the "License");
    # you may not use this file except in compliance with the License.
    # You may obtain a copy of the License at
    #
    #     http://www.apache.org/licenses/LICENSE-2.0
    #
    # Unless required by applicable law or agreed to in writing, software
    # distributed under the License is distributed on an "AS IS" BASIS,
    # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    # See the License for the specific language governing permissions and
    # limitations under the License.
    """This class demonstrates how to link the specified merchant to a GBP account."""

    from examples.authentication import configuration
    from examples.authentication import generate_user_credentials
    from google.shopping.merchant_accounts_v1 import GbpAccountsServiceClient
    from google.shopping.merchant_accounts_v1 import LinkGbpAccountRequest

    # Gets the merchant account ID from the configuration file.
    _ACCOUNT = configuration.Configuration().read_merchant_info()
    # Creates the parent resource name string.
    _PARENT = f"accounts/{_ACCOUNT}"


    def link_gbp_account(gbp_email: str) -> None:
      """Links the specified merchant to a Google Business Profile account.

      Args:
        gbp_email: The email address of the Business Profile account.
      """

      # Gets OAuth Credentials.
      credentials = generate_user_credentials.main()

      # Creates a client.
      client = GbpAccountsServiceClient(credentials=credentials)

      # Creates the request.
      request = LinkGbpAccountRequest(parent=_PARENT, gbp_email=gbp_email)

      # Makes the request and catches and prints any error messages.
      try:
        print("Sending link GBP account request:")
        # An empty response is returned on success.
        client.link_gbp_account(request=request)
        print(f"Successfully linked to GBP account: {gbp_email}")
      except RuntimeError as e:
        print("An error has occured: ")
        print(e)


    if __name__ == "__main__":
      # The email address of the Business Profile account.
      _gbp_email = "{GBP_EMAIL}"
      link_gbp_account(_gbp_email)