Can't post on my own business time line. Error says. The user hasn't authorized the application to perform this action - facebook

Question

I have a problem when trying to post on my own business time line on facebook.
I get an error that says:
"(OAuthException)(#200) The user hasn't authorized the application to perform this action"
I think this has to do with the scope "publish_actions" in somehow but how can I authorize this publish_actions permission exactly?
I have looked everywhere in my account under "https://developers.facebook.com"
I have put my App for review but I cant add "publish_actions" as a permission for Facebook to review because on this permission there is a message which says: "It looks like you haven't made any API requests to access content with the publish_actions permission in the last 30 days"
But how can I use this permission without having the permission??
I would be very greatful for help if I am on the right track and what I am missing out?
Thank you!
try
{
String appID = "12345";
String appSecret = "123456";
String accessToken = "123|1234_a-b";
String clientToken = "1234567";
String pageID = "123456789";
Facebook.FacebookClient client = new Facebook.FacebookClient(accessToken);
var dicParams = new Dictionary<string, object>();
dicParams["message"] = "Hello on the time line message!";
dicParams["caption"] = string.Empty;
dicParams["description"] = string.Empty;
dicParams["name"] = "Some Name";
dicParams["req_perms"] = "publish_stream,manage_pages,status_update,publish_actions";
dicParams["scope"] = "publish_stream,manage_pages,status_update,publish_actions";
dicParams["access_token"] = accessToken;
var publishResponse = client.Post("/" + pageID + "/feed", dicParams);
MessageBox.Show("You posted on the timeline successfully!");
}
catch (Exception ex)
{ MessageBox.Show(ex.ToString()); }
Attempt 2:
I was looking at the facebook documentation and found an URL which seems relevant to post a message on the business page timeline:
POST graph.facebook.com/{user-id}/feed?message={message}&access_token={access-token}
I have tried to put it down in code like below but again, I receive the same error message:
(OAuthException)(#200) The user hasn't authorized the application to perform this action
Question is what I do wrong. Do I need to get any other access token with "publish_action" permission?. If that is the case I can't figure out how to get such token?
String appID = "12345";
String appSecret = "123456";
String accessToken = "123|1234_a-b";
String clientToken = "1234567";
String pageID = "123456789";
String message = "Hello World";
String requestUrl = "https://graph.facebook.com/" + pageID + "/feed?message=" + message + "&access_token=" + accessToken;
RestSharp.RestClient rc = new RestSharp.RestClient();
RestSharp.RestRequest request = new RestSharp.RestRequest(requestUrl, RestSharp.Method.POST);
request.AddHeader("Content-Type", "application/json");
request.AddHeader("x-li-format", "json");
request.RequestFormat = RestSharp.DataFormat.Json;
RestSharp.RestResponse restResponse = (RestSharp.RestResponse)rc.Execute(request);
RestSharp.ResponseStatus responseStatus = restResponse.ResponseStatus;
//"(OAuthException)(#200) The user hasn't authorized the application to perform this action"
MessageBox.Show(restResponse.Content.ToString());

Answer 1

I have found a solution which works. This code do post a "Message" to the timeline.
Question This code works for my business page. I also like to post on my personal page for friends. So tried to change the pageID to the the ID which is my personal page: (pageID = "987654321") but still it posts on my business page.
I wonder if I need to get a page token specifically for the personal page as well?
If that is the case, I wonder how this token can be achieved?
/*********************************************************************************************************************************************************************/
//STEPS!!! to get a non-expiring page access token:
//1. access the following URL and note the returned access token within the browser's address bar:
//https://www.facebook.com/dialog/oauth?client_id=APP_ID&redirect_uri=REDIRECT_URI&scope=manage_pages,publish_actions&response_type=token
//2. access the following URL and within the returned data find the desired page's name and note the access token:
//https://graph.facebook.com/me/accounts?access_token=ACCESS_TOKEN_RETURNED_FROM_STEP_1
//3. access the following URL and note the returned access token:
//https://graph.facebook.com/oauth/access_token?client_id=APP_ID&client_secret=APP_SECRET&grant_type=fb_exchange_token&fb_exchange_token=PAGES_ACCESS_TOKEN_FROM_STEP_2
//use the Access Token Debugger to ensure your access token's profile ID matches the desired page's ID and it never expires
String newaccesstoken = "aaaaaaaaaaaabbbbbbbbbbbbbbccccccccccccccddddddddddddddddddd";
/*********************************************************************************************************************************************************************/
String appID = "12345";
String appSecret = "123456";
String accessToken = "123|1234_a-b";
String clientToken = "1234567";
String pageID = "123456789"; //Business page
//String pageID = "987654321"; //Personal page
String redirectURI = "http://example.com";
String message = "Hello Facebook";
String imageURL = "http://example.com/images/example-image.png";
String link = "http://example.co";
String caption = "example";
//Post a message to the time line
String requestUrl = "https://graph.facebook.com/" + pageID + "/feed?message=" + message + "&url=" + imageURL +
"&access_token=" + newaccesstoken;
RestSharp.RestClient rc = new RestSharp.RestClient();
RestSharp.RestRequest request = new RestSharp.RestRequest(requestUrl, RestSharp.Method.POST);
request.AddHeader("Content-Type", "application/json");
request.AddHeader("x-li-format", "json");
request.RequestFormat = RestSharp.DataFormat.Json;
RestSharp.RestResponse restResponse = (RestSharp.RestResponse)rc.Execute(request);
RestSharp.ResponseStatus responseStatus = restResponse.ResponseStatus;
MessageBox.Show(restResponse.Content.ToString() + "," + responseStatus.ToString());