schedtxt_api/Controllers/RegisterController.cs

using System.Linq;

using Microsoft.AspNetCore.Mvc;

using TextSender_API.Models;
using TextSender_API.Repositories;

namespace TextSender_API.Controllers;

[ApiController]
[Route("api/v1/user")]
public class RegisterController : ControllerBase
{
    #region Fields
    private readonly ILogger<RegisterController> _logger;
    private IConfiguration _config;
    #endregion


    #region Constructors        

    public RegisterController(ILogger<RegisterController> logger, IConfiguration config)
    {
        this._logger = logger;
        this._config = config;
    }
    #endregion

    #region Methods
    [HttpPost("register"), DisableRequestSizeLimit]
    public IActionResult Upload([FromBody] User userRequest)
    {
        try
        {
            var connString = this._config.GetConnectionString("MongoDBURI");
            var userRepo = new UserRepository(connString);
            var allUsers = userRepo.RetrieveAllUsers();
            var result = allUsers.Exists(ea => ea.Username.Equals(userRequest.Username));

            if (!result)
            {
                this._logger.LogInformation("Creating user");
                userRequest.DateCreated = DateTime.Now;
                userRepo.CreateUser(userRequest);
            }
            else
            {
                this._logger.LogInformation("User already exists");
            }
        }
        catch (Exception ex)
        {
            this._logger.LogError($"An error occurred: {ex.Message}");
        }

        return Ok();
    }
    #endregion
}