Function didkit::jni::Java_com_spruceid_DIDKit_DIDAuth

#[no_mangle]
pub extern "system" fn Java_com_spruceid_DIDKit_DIDAuth(
    env: JNIEnv<'_>, 
    _class: JClass<'_>, 
    holder: JString<'_>, 
    options: JString<'_>, 
    key: JString<'_>
) -> jstring