public void addSignatureConfiguration(final SignatureConfiguration signatureConfiguration) {
        assertNotNull("signatureConfiguration", signatureConfiguration);
        signatureConfigurations.add(signatureConfiguration);
    }
<p>addSignatureConfiguration.</p>

@param signatureConfiguration a {@link SignatureConfiguration} object
pac4j-jwt/src/main/java/org/pac4j/jwt/credentials/authenticator/JwtAuthenticator.java