How to use the @azure/core-http.isTokenCredential function in @azure/core-http

new RetryPolicyFactory(pipelineOptions.retryOptions),
    new LoggingPolicyFactory()
  ];

  if (isNode) {
    // ProxyPolicy is only avaiable in Node.js runtime, not in browsers
    let proxySettings: ProxySettings | undefined;
    if (typeof pipelineOptions.proxy === "string") {
      proxySettings = getDefaultProxySettings(pipelineOptions.proxy);
    } else {
      proxySettings = pipelineOptions.proxy;
    }
    factories.push(proxyPolicy(proxySettings));
  }
  factories.push(
    isTokenCredential(credential)
      ? bearerTokenAuthenticationPolicy(credential, "https://storage.azure.com/.default")
      : credential
  );

  return new Pipeline(factories, {
    HTTPClient: pipelineOptions.httpClient,
    logger: pipelineOptions.logger
  });
}

new StorageBrowserPolicyFactory(),
    deserializationPolicy(), // Default deserializationPolicy is provided by protocol layer
    new StorageRetryPolicyFactory(pipelineOptions.retryOptions),
    logPolicy({
      logger: logger.info,
      allowedHeaderNames: StorageBlobLoggingAllowedHeaderNames,
      allowedQueryParameters: StorageBlobLoggingAllowedQueryParameters
    })
  ];

  if (isNode) {
    // ProxyPolicy is only avaiable in Node.js runtime, not in browsers
    factories.push(proxyPolicy(pipelineOptions.proxyOptions));
  }
  factories.push(
    isTokenCredential(credential)
      ? bearerTokenAuthenticationPolicy(credential, StorageOAuthScopes)
      : credential
  );

  return new Pipeline(factories, {
    httpClient: pipelineOptions.httpClient
  });
}

this.url = escapeURLPath(url);
    this.accountName = getAccountNameFromUrl(url);
    this.pipeline = pipeline;
    this.storageClientContext = new StorageClientContext(
      this.url,
      pipeline.toServiceClientOptions()
    );

    this.isHttps = iEqual(getURLScheme(this.url) || "", "https");

    this.credential = new AnonymousCredential();
    for (const factory of this.pipeline.factories) {
      if (
        (isNode && factory instanceof StorageSharedKeyCredential) ||
        factory instanceof AnonymousCredential ||
        isTokenCredential(factory)
      ) {
        this.credential = factory;
      }
    }

    // Override protocol layer's default content-type
    const storageClientContext = this.storageClientContext as any;
    storageClientContext.requestContentType = undefined;
  }
}

new StorageBrowserPolicyFactory(),
    deserializationPolicy(), // Default deserializationPolicy is provided by protocol layer
    new StorageRetryPolicyFactory(pipelineOptions.retryOptions),
    logPolicy({
      logger: logger.info,
      allowedHeaderNames: StorageDataLakeLoggingAllowedHeaderNames,
      allowedQueryParameters: StorageDataLakeLoggingAllowedQueryParameters
    })
  ];

  if (isNode) {
    // ProxyPolicy is only avaiable in Node.js runtime, not in browsers
    factories.push(proxyPolicy(pipelineOptions.proxyOptions));
  }
  factories.push(
    isTokenCredential(credential)
      ? bearerTokenAuthenticationPolicy(credential, StorageOAuthScopes)
      : credential
  );

  return new Pipeline(factories, {
    httpClient: pipelineOptions.httpClient
  });
}

key: string | KeyVaultKey, // keyUrl or KeyVaultKey
    credential: TokenCredential,
    pipelineOptions: PipelineOptions = {}
  ) {
    const libInfo = `azsdk-js-keyvault-keys/${SDK_VERSION}`;
    if (pipelineOptions.userAgentOptions) {
      pipelineOptions.userAgentOptions.userAgentPrefix !== undefined
        ? `${pipelineOptions.userAgentOptions.userAgentPrefix} ${libInfo}`
        : libInfo;
    } else {
      pipelineOptions.userAgentOptions = {
        userAgentPrefix: libInfo
      };
    }

    const authPolicy = isTokenCredential(credential)
      ? challengeBasedAuthenticationPolicy(credential)
      : signingPolicy(credential);

    const internalPipelineOptions = {
      ...pipelineOptions,
      ...{
        loggingOptions: {
          logger: logger.info,
          logPolicyOptions: {
            allowedHeaderNames: [
              "x-ms-keyvault-region",
              "x-ms-keyvault-network-info",
              "x-ms-keyvault-service-version"
            ]
          }
        }

new StorageBrowserPolicyFactory(),
    deserializationPolicy(), // Default deserializationPolicy is provided by protocol layer
    new StorageRetryPolicyFactory(pipelineOptions.retryOptions),
    logPolicy({
      logger: logger.info,
      allowedHeaderNames: StorageQueueLoggingAllowedHeaderNames,
      allowedQueryParameters: StorageQueueLoggingAllowedQueryParameters
    })
  ];

  if (isNode) {
    // ProxyPolicy is only avaiable in Node.js runtime, not in browsers
    factories.push(proxyPolicy(pipelineOptions.proxyOptions));
  }
  factories.push(
    isTokenCredential(credential)
      ? bearerTokenAuthenticationPolicy(credential, StorageOAuthScopes)
      : credential
  );

  return new Pipeline(factories, {
    httpClient: pipelineOptions.httpClient
  });
}

pipelineOptions: PipelineOptions = {}
  ) {
    this.vaultUrl = vaultUrl;

    const libInfo = `azsdk-js-keyvault-secrets/${SDK_VERSION}`;
    if (pipelineOptions.userAgentOptions) {
      pipelineOptions.userAgentOptions.userAgentPrefix !== undefined
        ? `${pipelineOptions.userAgentOptions.userAgentPrefix} ${libInfo}`
        : libInfo;
    } else {
      pipelineOptions.userAgentOptions = {
        userAgentPrefix: libInfo
      };
    }

    const authPolicy = isTokenCredential(credential)
      ? challengeBasedAuthenticationPolicy(credential)
      : signingPolicy(credential);

    const internalPipelineOptions = {
      ...pipelineOptions,
      ...{
        loggingOptions: {
          logger: logger.info,
          logPolicyOptions: {
            allowedHeaderNames: [
              "x-ms-keyvault-region",
              "x-ms-keyvault-network-info",
              "x-ms-keyvault-service-version"
            ]
          }
        }

pipelineOptions: PipelineOptions = {}
  ) {
    this.vaultUrl = vaultUrl;

    const libInfo = `azsdk-js-keyvault-keys/${SDK_VERSION}`;
    if (pipelineOptions.userAgentOptions) {
      pipelineOptions.userAgentOptions.userAgentPrefix !== undefined
        ? `${pipelineOptions.userAgentOptions.userAgentPrefix} ${libInfo}`
        : libInfo;
    } else {
      pipelineOptions.userAgentOptions = {
        userAgentPrefix: libInfo
      };
    }

    const authPolicy = isTokenCredential(credential)
      ? challengeBasedAuthenticationPolicy(credential)
      : signingPolicy(credential);

    const internalPipelineOptions = {
      ...pipelineOptions,
      ...{
        loggingOptions: {
          logger: logger.info,
          logPolicyOptions: {
            allowedHeaderNames: [
              "x-ms-keyvault-region",
              "x-ms-keyvault-network-info",
              "x-ms-keyvault-service-version"
            ]
          }
        }

) {
    this.vaultUrl = vaultUrl;
    this.credential = credential;

    const libInfo = `azsdk-js-keyvault-certificates/${packageVersion}`;
    if (pipelineOptions.userAgentOptions) {
      pipelineOptions.userAgentOptions.userAgentPrefix !== undefined
        ? `${pipelineOptions.userAgentOptions.userAgentPrefix} ${libInfo}`
        : libInfo;
    } else {
      pipelineOptions.userAgentOptions = {
        userAgentPrefix: libInfo
      };
    }

    const authPolicy = isTokenCredential(credential)
      ? challengeBasedAuthenticationPolicy(credential)
      : signingPolicy(credential);

    const internalPipelineOptions = {
      ...pipelineOptions,
      ...{
        loggingOptions: {
          logger: logger.info,
          logPolicyOptions: {
            allowedHeaderNames: [
              "x-ms-keyvault-region",
              "x-ms-keyvault-network-info",
              "x-ms-keyvault-service-version"
            ]
          }
        }