Auth Actor 2

gistfile1.txt

actor AuthService {
    var tokenTask: Task<String, Error>?
    
    func getAuthToken() async throws -> String {
        if let localToken = getLocalToken(), 
            !localToken.isExpired { 
                return localToken 
            }
        
        if tokenTask == nil {
            tokenTask = Task(priority: high) { 
                try await refreshAuthToken() 
            }
        }

        defer { tokenTask = nil }
        return try await tokenTask!.value
    }
}