Now, let's create a request model named TodoRequest:

struct TodoRequest: RequestProtocol { 

    let todoId: Int 
    let name: String 
    let description: String 
    let notes: String 
    let completed: Bool 
    let synced: Bool 

    subscript(key: String) -> (String?, String?) { 
        get { 
            switch key { 
            case "todoId": return (String(todoId), "todoId") 
            case "name": return (name, "name") 
            case "description": return (description, "description") 
            case "notes": return (notes, "notes") 
            case "completed": return (String(completed), "completed") 
            case "synced": return (String(synced), "synced") 
            default: return ("Cookie","test=123") 
            } 
        } 
    } 
} 

As shown in the preceding code, this struct conforms to RequestProtocol. You might wonder why we have done this. First of all, this is an example of Protocol-Oriented Programming and second, we will use this request model in our post web service call.