public com.google.cloud.websecurityscanner.v1alpha.ScanConfig.AuthenticationOrBuilder
        getAuthenticationOrBuilder() {
      if (authenticationBuilder_ != null) {
        return authenticationBuilder_.getMessageOrBuilder();
      } else {
        return authentication_ == null
            ? com.google.cloud.websecurityscanner.v1alpha.ScanConfig.Authentication
                .getDefaultInstance()
            : authentication_;
      }
    }
<pre>
The authentication configuration. If specified, service will use the
authentication configuration during scanning.
</pre>

<code>.google.cloud.websecurityscanner.v1alpha.ScanConfig.Authentication authentication = 5;
</code>
java-websecurityscanner/proto-google-cloud-websecurityscanner-v1alpha/src/main/java/com/google/cloud/websecurityscanner/v1alpha/ScanConfig.java