What is the process to save user input in a Discord Bot developed in C#?

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I have created a Discord Bot using Discord.net and at the moment, I have a command that outputs a fixed string. However, I would like to implement a command that replies with a string provided by the user instead. Here is a basic structure I am working with:

using System;
using System.Threading.Tasks;
using Discord.Commands;
using Discord.WebSocket;

namespace MyDiscordBot.Modules
{
    public class UserInputModule : ModuleBase<SocketCommandContext>
    {
        [Command("save")]  
        public async Task SaveInputAsync([Remainder] string userInput)
        {
            await ReplyAsync(userInput);
        }
    }
}

I have prior experience with console applications, but I’m not familiar with handling user input in this context. Any guidance would be helpful!