--Args: the arguments String which was typed behind the /slashCommand <argumenst String>
--Will be split at space into the options table.
--slashCommand is the /slashCommand used
local function parseSlashCommandArguments(args, slashCommand)
    --Parse the arguments string
    local options = {}
    --local searchResult = {} --old: searchResult = { string.match(args, "^(%S*)%s*(.-)$") }
    for param in string.gmatch(args, "([^%s]+)%s*") do
        if (param ~= nil and param ~= "") then
            options[#options+1] = string.lower(param)
        end
    end
    --Should a dice be thrown= Chekc for the 2nd argument ONLY and validate as number
    if slashCommand == "/mySlashCommand" then
        if options[1] ~= nil then
            local intVal = tonumber(options[1])
            if type(intVal) == "number" then
                return intVal
            end
        else
            --Default integer value
            return 10
        end
 
    elseif slashCommand == "/guildname" then
        --guildId
        local guildIndex
        guildIndex = options[1]
        if guildIndex ~= nil then
            local intVal = tonumber(guildIndex)
            if type(intVal) == "number" then
                guildIndex = intVal
                if not guildIndex or guildIndex <= 0 or guildIndex > MAX_GUILDS then
                    guildIndex = nil
                else
                    return ZO_CachedStrFormat(SI_UNIT_NAME, GetGuildName(GetGuildId(guildIndex)))
                end
            else
                guildIndex = nil
            end
        end
        return nil
    end
end

StartChatInput("Hello world", CHAT_CHANNEL_WHISPER, '@AccountNameToWhisperTo')

Nananananananana...