# Start meeting from Win SDK with SSO login. Wrong Usage Error. **URL:** \ **Category:** Windows\ **Created:** [February 21, 2018, 12:44pm UTC](https://devforum.zoom.us/t/start-meeting-from-win-sdk-with-sso-login-wrong-usage-error/1008 "2018-02-21T12:44:36Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Mustafa\_Savas](https://avatars.discourse-cdn.com/v4/letter/m/3bc359/32.png) [@Mustafa\_Savas](https://devforum.zoom.us/u/Mustafa_Savas)\ **Post date:** [February 21, 2018, 12:44pm UTC](https://devforum.zoom.us/t/start-meeting-from-win-sdk-with-sso-login-wrong-usage-error/1008/1 "2018-02-21T12:44:36Z")
we are trying to login from windows sdk and start scheduled meeting. User was created from rest api with action ssoCreate, and we have got SSOToken from rest api with Retrieve a user’s token. First, we login with SSO token. Sample code is ZoomInstance.GetAuthServiceWrap().Add\_CB\_onLoginRet(OnLoginRet); LoginParam4SSO loginSSOParam = new LoginParam4SSO();  loginSSOParam.ssoToken = token; LoginParam loginParam = new LoginParam();  loginParam.loginType = LoginType.LoginType\_SSO;  loginParam.ssoLogin = loginSSOParam; var loginResult = ZoomInstance.GetAuthServiceWrap().Login(loginParam); And then, We start the meeting with this code, StartParam4APIUser apiUser = new StartParam4APIUser();  apiUser.meetingNumber = meetingId;  apiUser.userID = userId; StartParam startParam = new StartParam();  startParam.apiuserStart = apiUser;  startParam.userType = SDKUserType.SDK\_UT\_APIUSER; SDKError err = ZoomInstance.GetMeetingServiceWrap().Start(startParam);  if (err != SDKError.SDKERR\_SUCCESS)  Console.WriteLine(err.ToString() + “. Start Meeting Operation FAILED”); But err code is SDKERR\_WRONG\_USEAGE.  How can we solve this problem ?  We are waiting for your reply.  Thank you. ---
**Author:** ![Wei\_Guo1](https://avatars.discourse-cdn.com/v4/letter/w/ec9cab/32.png) [@Wei\_Guo1](https://devforum.zoom.us/u/Wei_Guo1)\ **Post date:** [February 21, 2018, 5:51pm UTC](https://devforum.zoom.us/t/start-meeting-from-win-sdk-with-sso-login-wrong-usage-error/1008/2 "2018-02-21T17:51:35Z")
Hi Mustafa, Could you please share the Login Result? And also please use Normal User as user type. Best ---
**Author:** ![Mustafa\_Savas](https://avatars.discourse-cdn.com/v4/letter/m/3bc359/32.png) [@Mustafa\_Savas](https://devforum.zoom.us/u/Mustafa_Savas)\ **Post date:** [February 22, 2018, 11:40am UTC](https://devforum.zoom.us/t/start-meeting-from-win-sdk-with-sso-login-wrong-usage-error/1008/3 "2018-02-22T11:40:25Z")
Hi, I tried to start with normaluser but the same error has occured. Out login result is SDK\_WRONG\_USAGE, but in onLoginRet event function LOGIN\_STATUS is LOGIN\_SUCCESS. AccountInfo has correct displayname.   public void onAuthenticationReturn(AuthResult ret) { ZOOM\_SDK\_DOTNET\_WRAP.LoginParam4SSO loginSSOParam = new LoginParam4SSO(); loginSSOParam.ssoToken = token; ZOOM\_SDK\_DOTNET\_WRAP.LoginParam loginParam = new ZOOM\_SDK\_DOTNET\_WRAP.LoginParam(); loginParam.loginType = LoginType.LoginType\_SSO; loginParam.ssoLogin = loginSSOParam; ZOOM\_SDK\_DOTNET\_WRAP.CZoomSDKeDotNetWrap.Instance.GetAuthServiceWrap().Add\_CB\_onLoginRet(onLoginRet); var loginResult = ZOOM\_SDK\_DOTNET\_WRAP.CZoomSDKeDotNetWrap.Instance.GetAuthServiceWrap().Login(loginParam); Debug.WriteLine(loginResult.ToString()); } public void onLoginRet(LOGINSTATUS ret, IAccountInfo pAccountInfo) { Debug.WriteLine(ret.ToString()); } ---
**Author:** ![dats\_liao](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/dats_liao/32/464_2.png) [@dats\_liao](https://devforum.zoom.us/u/dats_liao)\ **Post date:** [February 23, 2018, 1:20am UTC](https://devforum.zoom.us/t/start-meeting-from-win-sdk-with-sso-login-wrong-usage-error/1008/4 "2018-02-23T01:20:12Z")
could you show me your stare meeting code and where you call this api? thanks. ---
**Author:** ![Mustafa\_Savas](https://avatars.discourse-cdn.com/v4/letter/m/3bc359/32.png) [@Mustafa\_Savas](https://devforum.zoom.us/u/Mustafa_Savas)\ **Post date:** [February 26, 2018, 8:59am UTC](https://devforum.zoom.us/t/start-meeting-from-win-sdk-with-sso-login-wrong-usage-error/1008/5 "2018-02-26T08:59:14Z")
i have already sent to meeting start codes.   StartParam4APIUser apiUser = new StartParam4APIUser();  apiUser.meetingNumber = meetingId;  apiUser.userID = userId; StartParam startParam = new StartParam();  startParam.apiuserStart = apiUser;  startParam.userType = SDKUserType.SDK\_UT\_APIUSER; SDKError err = ZoomInstance.GetMeetingServiceWrap().Start(startParam);  if (err != SDKError.SDKERR\_SUCCESS)  Console.WriteLine(err.ToString() + “. Start Meeting Operation FAILED”);   We tried the same process at the electron side, it worked properly. But c# wrapper does not work to start function by logging on. ---
**Author:** ![dats\_liao](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/dats_liao/32/464_2.png) [@dats\_liao](https://devforum.zoom.us/u/dats_liao)\ **Post date:** [February 27, 2018, 1:16am UTC](https://devforum.zoom.us/t/start-meeting-from-win-sdk-with-sso-login-wrong-usage-error/1008/6 "2018-02-27T01:16:40Z")
hi,  1. you need to call start meeting after you got login success callback event 2.please change to StartParam4NormalUser and SDK\_UT\_NORMALUSER thanks. dats ---
**Author:** ![DeveloperBot](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/developerbot/32/12632_2.png) [@DeveloperBot](https://devforum.zoom.us/u/DeveloperBot)\ **Post date:** [August 21, 2020, 5:37pm UTC](https://devforum.zoom.us/t/start-meeting-from-win-sdk-with-sso-login-wrong-usage-error/1008/7 "2020-08-21T17:37:52Z")
Closed on August 21, 2020, 5:37pm UTC