private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.websecurityscanner.v1.ScanConfig.Authentication,
            com.google.cloud.websecurityscanner.v1.ScanConfig.Authentication.Builder,
            com.google.cloud.websecurityscanner.v1.ScanConfig.AuthenticationOrBuilder>
        getAuthenticationFieldBuilder() {
      if (authenticationBuilder_ == null) {
        authenticationBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.websecurityscanner.v1.ScanConfig.Authentication,
                com.google.cloud.websecurityscanner.v1.ScanConfig.Authentication.Builder,
                com.google.cloud.websecurityscanner.v1.ScanConfig.AuthenticationOrBuilder>(
                getAuthentication(), getParentForChildren(), isClean());
        authentication_ = null;
      }
      return authenticationBuilder_;
    }
<pre>
The authentication configuration. If specified, service will use the
authentication configuration during scanning.
</pre>

<code>.google.cloud.websecurityscanner.v1.ScanConfig.Authentication authentication = 5;
</code>
java-websecurityscanner/proto-google-cloud-websecurityscanner-v1/src/main/java/com/google/cloud/websecurityscanner/v1/ScanConfig.java