I am trying to connect to a google worksheet with a service account and have added the GoogleAPIClientForRest (Drive and Sheets) and GTMSessionFetcher (Core) dependencies to my project. However, this code import GoogleAPIClientForRESTCore import GTMSessionFetcherCore func test() { let x = GTLRServiceAccountCredentials.self let y = GTLRAuthorizer.self print("Classes Found") } I get the the following errors: Cannot find "GTLRServiceCredentials' in scope and Cannot find 'GTLRAuthorizer' in scope. The dependencies are listed in the Link Binary with Libraries section. I have am using the latest versions of OS and Xocod and have reinstalled both to try and resolve this issue with no luck.