public async Task <IActionResult> ExchangeAcessToken([FromBody] ExchangeAcessTokenRequestModel token) { if (!ModelState.IsValid) { return(BadRequest("Invalid request body")); } try { ApplicationUser user = await _userManager.FindByIdAsync(User.FindFirstValue("Id")); var longAccessTokenResponse = await _facebookService.GetLonglivedAccessToken(token.AccessToken); var facebookdata = await _userManager.UpdateFacebookAccessTokenAsync(user.Id, longAccessTokenResponse.AccessToken); return(Ok(facebookdata.AccessToken)); } catch (Exception err) { return(BadRequest(err.Message)); } }