public static com.google.cloud.websecurityscanner.v1.ScanConfig.Authentication.IapCredential
                .IapTestServiceAccountInfo
            parseFrom(java.io.InputStream input) throws java.io.IOException {
          return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
        }
<pre>
Required. Describes OAuth2 client id of resources protected by
Identity-Aware-Proxy (IAP).
</pre>

<code>string target_audience_client_id = 1 [(.google.api.field_behavior) = REQUIRED];
</code>

@return The bytes for targetAudienceClientId.
java-websecurityscanner/proto-google-cloud-websecurityscanner-v1/src/main/java/com/google/cloud/websecurityscanner/v1/ScanConfig.java