In Xcode, select File ▸ Add Package Dependencies… Then, paste the GitHub repository URL: 
https://github.com/getuserkit/UserKit-ios
in the search bar. With the UserKit-iOS source selected, make sure your project name is selected in Add to Project. Then click Add Package: After the package has loaded, make sure Add to Target is set to your app’s name and click Add Package:
All done Next up is enabling capabilities