I'm trying to implement whatsapp business API but I'm getting forbidden error I think its because i dont have enough permission. I have also implemented this code on Postman its works fine there but its not working in app i dont know why?

var client = new HttpClient();         var request = new HttpRequestMessage(HttpMethod.Post, "https://graph.facebook.com/v15.0/110474688636083/messages");         request.Headers.Add("Authorization", "Bearer EAAM2wERIcIsBAFSGQD3yCSYRd5II5u7hU1859z8VcpNFlZBjJrqJUR2QrgZADHlHYSCG0zWvpYqVkFlzea9TsN1wnu8ZBZBSiEaXQu5OZAQC63ufVKZAQDHZB25CIq3TBQ9rxr2DdZB1oZBgJtia4eAEBbzqfjwJpXm9M5SZCGhDh7JbK0s1ldz2Od099jHfKrFvnQDZD");         var content = new StringContent("{\n    \"messaging_product\": \"whatsapp\",\n    \"to\": \""+WHATSAPPNO+"\",\n    \"type\": \"template\",\n    \"template\": {\n        \"name\": \"hello_world\",\n        \"language\": {\n            \"code\": \"en_US\"\n        }\n    }\n}", null, "application/json");         request.Content = content;         var response = await client.SendAsync(request);         response.EnsureSuccessStatusCode();         Console.WriteLine(await response.Content.ReadAsStringAsync()); 

thank you for your time

I want to fetch location details for all the ads from google adwords but I am getting null entries.I am not able to get any data from adwords api .Help me in That as according to my knowledge there is not problem with my code and I am not able to find any solution for that.My code that I have tried is written below.

 public void GetLocationAds()             {                 AdWordsUser user = new AdWordsUser();                 {                     try                     {                         int offset = 0;                                                                 // Create selector.                         using (CampaignCriterionService campaignCriterionService =                             (CampaignCriterionService)user.GetService(AdWordsService.v201809.CampaignCriterionService))                         {                             Selector selector = new Selector()                             {                                 fields = new string[]                              {                                   CampaignCriterion.Fields.CampaignId,                                     CampaignCriterion.Fields.CampaignCriterionStatus,                                      //Location.Fields.LocationName,                                      //Location.Fields.CriteriaType,                                      //Location.Fields.ParentLocations,                                      //LocationCriterion.Fields.CanonicalName,                                      //LocationCriterion.Fields.CountryCode,                                   CampaignCriterion.Fields.IsNegative,                              },                            //     predicates = new Predicate[]                            //{                            //    Predicate.Equals( "CriteriaType","LOCATION"),                            //},                                 paging = Paging.Default,                                 ordering = new OrderBy[]                        {                                 OrderBy.Asc(  CampaignCriterion.Fields.CampaignId)                        }                             };                             CampaignCriterionPage page = new CampaignCriterionPage();                             do                             {                                 // Get the ad groups.                                  page = campaignCriterionService.get(selector);                                 // Display the results.                                 if (page != null && page.entries != null)                                 {                                     int j = selector.paging.startIndex;                                     foreach (CampaignCriterion campaignCriterion in page.entries)                                     {                                         var campaignId = campaignCriterion.campaignId;                                         bool IsLocation = campaignCriterion.isNegative;                                         var CampaignCriterionType = campaignCriterion.CampaignCriterionType;                                     }                                 }                                 else                                 {                                     Console.Write("No campaignCriterion were found.");                                 }                                 selector.paging.IncreaseOffset();                             }                             while (selector.paging.startIndex < page.totalNumEntries);                         }                     }                     catch (Exception ex)                     {                     }                 }             } 

Kindly help me in that.

As I need to send message on user's whatsapp number so I have downloaded WhatsApp API from nuget packages. and also I implemented code according to that. But after so many search I found that I need to register mobile number to get password...using WART but I think this application is not working and not able to get password from WhatsApp.

So if anyone implement this feature of sending message on whatsapp number in Asp.net c# then please update me how to do this using WhatsApp Api.. even I don't know whatsapp is provide any API or not.

I have tried with below code...but I need password before that..

            string fromMob = "919xxxxxxxxx";             string toMob = txtMobileNo.Text.Trim();             string msg = "This is first WhatsApp Message Whatsapp API";             WhatsApp wa = new WhatsApp(fromMob, "RequiredPassword", "SD", false, false);             try             {                 wa.OnConnectSuccess += () =>                 {                     wa.OnLoginSuccess += (phoneNumber, data) =>                     {                         wa.SendMessage(toMob, msg);                     };                     wa.OnLoginFailed += (data) =>                         {                             msg = "Login Failed" + data;                         };                 };                 wa.OnConnectFailed += (ex) =>                     {                         msg = "Connection Failed" + ex;                     };                 wa.Connect();             }             catch { }