I have a new sandbox account and am wanting to know if it's possible to use that account in the iOS app?
Thanks for replying so quickly Tyler. Yes the REST API is working for me. My question was whether I can sign in to the iOS app with my Sandbox account and test calls/messages, like I can do with the MacOS desktop app. In the MacOS desktop app I have to switch to Sandbox via Cmd+F2 keys; is there anything like that for iOS app to switch to Sandbox environment for sign in?