Service URL Authentication in OData native app

Hi Experts,

We are trying to implement security Authentication for OData iOS native app (using SMP 2.3 SP02) .

Scenario is like, we are authenticating at SMP level using AD details (windows username and password). 

Generally when we run an OData URL in a browser, it asks for gateway user and password. My question is how we can handle gateway credential details (OData service URL) in the application once authentication at AD level is successful.

Note: We have referred this doc Enabling Single Sign-on for OData Applications

Please share your thoughts and experience, would really be appreciated.

Rgrds,

Jitendra