c# - Youtube API access is granted but I still have Invalid Credentials error -

trying test search functions of youtubeapi, getting

could because of channel(which binded gmail account, using in console.developers.google) banned?

upd: created new account, situation still same

well, i've have done here:

1. created porject in console.developers.google
2. activated youtube data api(choosed app or somth this, not js one), downloaded json, looks that

3. first call authorize method (new page shows, asking permission, clicking allow button, , seems ok), trying use search , 401 error

heres code

using system; using system.collections.generic; using system.linq; using system.web;  namespace webapplication3.services.serviceauthoriaztion.impl {     using system.data.entity.core.metadata.edm;     using system.io;     using system.threading;     using google.apis;     using google.apis.auth.oauth2;     using google.apis.services;     using google.apis.util.store;     using google.apis.youtube.v3;       public class youtube : icustomservice     {         private static youtubeservice _currentyoutubeservice;          public void authorize()         {             usercredential usercreds;            ;             var filepath = string.format("{0}{1}",appdomain.currentdomain.basedirectory, @"app_data\client_id.json");             using (var stream = new filestream(filepath, filemode.open, fileaccess.read))             {                 usercreds = googlewebauthorizationbroker.authorizeasync(                     googleclientsecrets.load(stream).secrets,                     new[] {youtubeservice.scope.youtubereadonly},                     "user",                     cancellationtoken.none,                     new filedatastore("youtubedata")                     ).result;             }              _currentyoutubeservice = new youtubeservice(new baseclientservice.initializer             {                 httpclientinitializer = usercreds,                 applicationname = "yttest"             });              serachtest();          }          private void serachtest()         {             var searchlistrequest = _currentyoutubeservice.search.list("snippet");             searchlistrequest.q = "google"; // replace search term.             searchlistrequest.maxresults = 50;              // call search.list method retrieve results matching specified query term.             var searchlistresponse = searchlistrequest.execute();              var asa = new list<string>();          }     } } 

upd2: tried other type of app - not helped either. json file looks

okay, decided start scratch, so, don't know helped me here's simple instructions how made work. , also, here's proof :)

so, first created new project, set name of daniltestapp.

second, turned on youtube data api there.

when creating new credentials, choosed oauth client id , then, type, choosed other.

after ready downloaded json.

then in code decide add refreshing token functionality, looks this

using system; using system.collections.generic; using system.linq; using system.web;  namespace webapplication3.services.serviceauthoriaztion.impl {     using system.data.entity.core.metadata.edm;     using system.io;     using system.threading;     using google.apis;     using google.apis.auth.oauth2;     using google.apis.services;     using google.apis.util.store;     using google.apis.youtube.v3;       public class youtube : icustomservice     {         private static youtubeservice _currentyoutubeservice;          public void authorize()         {             usercredential usercreds;              var filepath = string.format("{0}{1}", appdomain.currentdomain.basedirectory, @ "app_data\client_id.json");             using (var stream = new filestream(filepath, filemode.open, fileaccess.read))             {                 usercreds = googlewebauthorizationbroker.authorizeasync(                  googleclientsecrets.load(stream).secrets,                  new[] {           youtubeservice.scope.youtubereadonly                  },                  "user",                  cancellationtoken.none,                  new filedatastore("youtubedata")                 ).result;             }              refreshtoken(usercreds);              _currentyoutubeservice = new youtubeservice(new baseclientservice.initializer             {                 httpclientinitializer = usercreds,                 applicationname = "daniltestapp"             });              serachtest();          }          private void serachtest()         {             var searchlistrequest = _currentyoutubeservice.search.list("snippet");             searchlistrequest.q = "google"; // replace search term.             searchlistrequest.maxresults = 50;              // call search.list method retrieve results matching specified query term.             var searchlistresponse = searchlistrequest.execute();              var asa = new list<string>();          }         //might not work, this, got working code @ home, office right         private void updatetokenifexpired(usercredential credential)         {            if (credential.token.isexpired(credential.flow.clock))            {                 console.writeline("the access token has expired, refreshing it");                if (credential.refreshtokenasync(cancellationtoken.none).result)                {                    console.writeline("the access token refreshed");                }                else                {                    throw new exception("refresh token failed");                }             }        }      } }