We don't have SAP Netweaver Gateway components available to us in our environment. We also do not uses SUP.
We have a third party cloud based platform that we develop mobile apps on.
In our Active Directory we have single sign-on configured to our SAP environment - i.e. when users sign-in through the browser while logged into our network they are not asked for their SAP username and password - they are logged in with their AD credentials.
Our mobile platform has connections to our SAP environment via a site-to-site VPN.
We are building a mobile app that will pull data from SAP via our cloud platform.
What are our authentication options for this scenario without SAP Netweaver? e.g. so that the user can authenticate from within the mobile app using their AD credentials.