How to use middle war to get next request asp.net core 2

Question

How to get next request pipline in case of token success .

suppose i need to get data from action result get request by post man

[HttpGet(Contracts.ApiRoutes.Security.GetUserMenus)]
       public IActionResult GetUserMenu(string userId)
       {
           string strUserMenus = _SecurityService.GetUserMenus(userId);
           return Ok(strUserMenus);
       }

 

i write on postman link as  then select get then write on header 

 

key : authorization  

value :eeerrttyyyyy

 

when invalid access token then it will show message invalid token

 

if valid access token it will continue execution and get result from action 

 

this is actually i need on next but cannot do it

public async Task InvokeAsync(HttpContext context, DataContext dataContext) {

 var validKey = false;

 // than you logic to validate token
 var CheckExistAccessToken = context.Request.Headers.ContainsKey("Authorization");
 var AccessTokenValue = context.Request.Headers["Authorization"].SingleOrDefault();



 if (CheckExistAccessToken) {

  bool isvalid = _tockenvalidator.ValidateToken(AccessTokenValue);
  if (isvalid) {
   validKey = true;
  } else {
   validKey = false;
  }


 }
 if (!validKey) {
  context.Response.StatusCode = (int) HttpStatusCode.Forbidden;
  await context.Response.WriteAsync("Invalid Token");
 }
 //if validm than next middleware Invoke
 else {
  //success token
  context.Request.EnableRewind();
  await _next.Invoke(context);
  // how to get next request meaning i need to get result of action getusermenu

 }


}
}

 my result show on post man as below but on my app show invalid token although

on i make debug and token is valid and reach until

await _next.Invoke(context); but not show result

actually i need to show data display on postman