Hi Warrenexo35, Have a look at the tutorial at http://dev.mxit.com/docs/wcf-net-api-tutorial rather.
How do i log into my app and make it available to users
Good Afternoon Candma,
You will need to log into your Developer Dashboard and click on Publish this App.
Once your app reaches the Published State - it can be discovered by all users on Mxit. However at any time you can give users the App Name to manually add on Mxit just as they would a normal contact using the App Name as the Mxit ID.