public Builder setIapTestServiceAccountInfo(
            com.google.cloud.websecurityscanner.v1.ScanConfig.Authentication.IapCredential
                    .IapTestServiceAccountInfo
                value) {
          if (iapTestServiceAccountInfoBuilder_ == null) {
            if (value == null) {
              throw new NullPointerException();
            }
            iapCredentials_ = value;
            onChanged();
          } else {
            iapTestServiceAccountInfoBuilder_.setMessage(value);
          }
          iapCredentialsCase_ = 1;
          return this;
        }
<pre>
Authentication configuration when Web-Security-Scanner service
account is added in Identity-Aware-Proxy (IAP) access policies.
</pre>

<code>
.google.cloud.websecurityscanner.v1.ScanConfig.Authentication.IapCredential.IapTestServiceAccountInfo iap_test_service_account_info = 1;
</code>
java-websecurityscanner/proto-google-cloud-websecurityscanner-v1/src/main/java/com/google/cloud/websecurityscanner/v1/ScanConfig.java