public string Execute(IReadOnlyList <string> args)
        {
            if (args.Count != 1)
            {
                throw new ArgumentException("League name should be entered");
            }
            var name = args[0];

            InputValidations.ValidateLength(InputValidations.MIN_NAME, InputValidations.MAX_NAME, name,
                                            $"A league's name must be between {InputValidations.MIN_NAME} and {InputValidations.MAX_NAME} characters");

            var matches = service.CreateMatches(name);
            var answer  = PrintMatches(matches);

            return(answer);
        }