How to use DynamoDb

[twofacednine380]

After reading the documentation on AWS about AWS sdk for swift, I started coding the DynamoDBInterface for my simple project.
But I'm having an error from Xcode even if I follow the guidelines.

Here is the code

`

 class DynamoInterface {

    static let shared = DynamoInterface()

    let dynamoDbClient: DynamoDbClient

    private init() {
       do{
            try dynamoDbClient = DynamoDbClient(region: "eu-central-1")
        } catch {
            print("error while connecting to region")
            exit(1)
        }
    }

    func listAllTables() {
        dynamoDbClient.listTables(input: ListTablesInput()) { result in
            switch(result) {
            case .success(let response):
                guard let namesOfTables = response.tableNames else {
                    return
                }
                 for currName in namesOfTables {
                    print("Table name is \(currName)")
                }
            case .failure(let err):
                print(err)
            }
        }
    }
}

`

Here is the error:

Extra trailing closure passed in call

Is there something that I'm missing?

Thanks in advance for any answer.