Hardcoding custom server address in Rocket.Chat.Reakt

Where can this be changed in the Rocket.Chat.Reakt code?

Our users only go to one server. So I want to hardcode this in the app so that they don’t have to fill out the address when they first login.

Please don’t cross post.
I’ve already asked you to follow the docs Whitelabeling mobile apps - Rocket.Chat Docs

Keep in mind that you will need an intermediate knowledge of Android/iOS development and basic Javascript knowledge