1. log into https://graph.api.smartthings.com/
2. Click My Smart Apps (If you don't see any of your smart apps, Click My Locations and then click the correct location first)
3. Click Settings
4. Click add new repository
5. Enter joshs85 for Owner
6. Enter ST_TankUtility for the Name
7. Enter master for the branch.
8. Click save when completed
9. On the My Smart Apps page, click Update from repo and check the check box next to tank-utility-connect.groovy
10. Check the publish box at the bottom of the screen and then click Execute Update
11. On the My Device Handlers Page, click Update from repo and check the check box next to tank-utility.groovy
12. Check the publish box at the bottom of the screen and then click Execute Update

Now you can install the app in smart things by going to Automation > Add a Smart App > My Apps > TankUtility (Connect)