xcodeproj: error: Signing for "MyProject" requires a development team. Select a development team in the Signing & Capabilities editor. (in target 'MyProject' from project 'MyProject (IOS)') LogPlayLevel: UAT: ** BUILD FAILED **

You might need to enter your developer credentials in Xcode. You can start by double clicking your IOS Xcode project in your project folder.

Top Left → XCode → Settings → Accounts and enter your developer information here.

After that’s done, you can click on the folder icon in Xcode → Click and open Games → Click your game name → And click the file that doesn’t say “Editor”. You’ll see a “Signing and Capabilities” tab in the center of the screen. Click that and make sure your information is there. It should auto populate.