How to convert User class object to json file when success l

Question

problem

How to convert User class object to json file when success login ?

I need to convert user class object to json file represent status of login and data related as following ;

this is actually desired result :

 

{
"request_status" : {
"status" : "succeeded",
"code": 0,
"message" : "login succeeded!"
},
"user_data": {
  "UserFullName" : "Admin",
  "LoginTime" : "12:00"

},
"branches": [
{
  "BranchCode" : "1",
  "BranchName":"Baha"

}
]
}

What I try is :

 [HttpPost(Contracts.ApiRoutes.Login.PostUserLogin)]
        public  IActionResult PostUserLogins(Users user)
        {
            int LoginStatus = _AuthunticateService.PostUserLogin(user.UserName,user.Password ,out DataTable Branches,out string errorMessage, out int statusCode);
            if(LoginStatus == 0)
            {
                user.StatusCode = statusCode;
                user.StatusText = "succeeded";
                user.MessageStatus = "login succeeded!";
                if (Branches.Rows.Count > 0)
                {
                    user.dtgetBranches = Branches;
                }
                user.LoginTime = DateTime.Now.ToString();
// How to convert user class after assign values to json result as script above diplay
            }
         }
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 string BrowserInfo { get; set; }
        public DataTable dtgetBranches { get; set; }
        public string LoginTime { get; set; }
    }
How to convert user class object to json format as above ?