public async Task <int> Execute(object command)
        {
            var searchCommand = (SearchCommand)command;

            var searchRegex = new Regex(
                string.IsNullOrEmpty(searchCommand.SearchRegex) ? "\\w." : searchCommand.SearchRegex,
                RegexOptions.Compiled | RegexOptions.IgnoreCase);

            try
            {
                var allVariables = await _repository.LoadAll();

                var matches = allVariables
                              .SelectMany(all => all.Variables.Select(variable => new { all.Resource, Variable = variable }))
                              .Select(x => new { Variable = x, Match = searchRegex.Match(x.Variable.Name) })
                              .Where(x => x.Match.Success)
                              .ToList();

                var formatVariableSet  = matches.Max(x => x.Variable.Resource.Name.Length);
                var formatVariableName = matches.Max(x => x.Variable.Variable.Name.Length);

                foreach (var match in matches)
                {
                    Console.WriteLine($"{match.Variable.Resource.Name.PadRight(formatVariableSet)} {match.Variable.Variable.Name.PadRight(formatVariableName)}");
                }

                new ReportWriter().WriteReport(searchCommand, () =>
                {
                    return(string.Join(Environment.NewLine, matches.Select(x => $"{x.Variable.Resource.Name.PadRight(formatVariableSet)} {x.Variable.Variable.Name.PadRight(formatVariableName)}")));
                }, () =>
                {
                    return(matches.GroupBy(x => x.Variable.Resource).Select(x => new { VariableSet = x.Key, Variables = x.Select(y => y.Variable.Variable) }));
                }, () =>
                {
                    return(matches.GroupBy(x => x.Variable.Resource).Select(x => new { VariableSet = x.Key, Variables = x.Select(y => y.Variable.Variable) }));
                });

                return(0);
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
                return(-1);
            }
        }