MAFLogon iOS problem with HTTP/HTTPS Provider Authentication?

Hi experts,

I'm working with MAFLogon Library iOS. This is my scenario:

- I create and config a Security connection(provider) as HTTP/HTTPS Authentication

- The URL Destination need 2 authentication type to confirm and authorize user's credential:

      + Authorization: Basic <smp_account_encoded_base64>

      + user-login: Basic <account_password_encoded_base64>

- Then i create an application, use that Security provider.

- I want to use MAFLogon library to register/logon devices.

Test in REST Client:

It works fine.

But i wonder, how can i supply the field: "user-login" in MAFRegistrationContext and send it ???? I've searched all property of MAF components, but i cannot find helpful information.

Thanks and Best Regard,

Sao Vu.