I am trying to compare Couchbase, Firebase, and AWS Cognito to decide which to recommend for an upcoming project at work. The solution needs to work with both Android and iOS, but I am prototyping with iOS using Swift. I am trying to get the demo Swift app running but seeing errors I don’t know how to address (screenshot attached). Note: I am new to iOS development. Note2: When I first started Xcode with the demo app, it mentioned that the code was written for a previous version of Swift and offered to convert the project code. I was worried that that might introduce some confusion so I did not do it.