How to do count login attempt within period ?

public class Users
    {
        public string UserName { get; set; }
        public string Password { get; set; }
        public string MessageStatus { get; set; }
        public int StatusCode { get; set; }
        public string StatusText { get; set; }
        public string IpAddress { get; set; }
        public List<Branches> Branches { get; set; }
        public string LoginTime { get; set; }
        public string AccessToken { get; set; }
    }
[HttpPost(Contracts.ApiRoutes.Login.PostUserLogin)]
        public  IActionResult PostUserLogins([FromBody]Users user)
        {
            string JsonResults = "";
            int LoginStatus = _AuthunticateService.PostUserLogin(user.UserName,user.Password ,out DataTable dtBranches,out string errorMessage, out int statusCode);
            
             if(LoginStatus == 1)
            {
                user.StatusCode = statusCode;
                user.StatusText = "failed";
                user.MessageStatus = "login failed, incorrect username or password";
               

            }
            else if(LoginStatus == 2)
            {
                user.StatusCode = statusCode;
                user.StatusText = "failed";
                user.MessageStatus = "password has expired!";
                
            }
            return Ok(JsonResults);
        }

public int PostUserLogin(string UserId, string Password, out DataTable dtGetBranches, out string errorMessage, out int statusCode)
        {
            statusCode = 0;
            bool IsUserValid = false;
            dtGetBranches = null;
            errorMessage = null;

            if (!string.IsNullOrEmpty(UserId))
            {

          //how to check login prompt count 
               // check user validation
                if (IsUserValid)
                {
                    statusCode = 0;
                    IsUserValid = true;
                  //get user branches 
//get user id 
                }
                else
                {
                    statusCode = 1;
                    IsUserValid = false;
                    errorMessage = string.Format("Invalid User Name {0} Or Password {1}", UserId, Password);
                }

            }
            return statusCode;
        }