asp.net mvc 4 - disconnect client from server side signalr -

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i'm using signalr 1 mvc4 c# web application form authentication. have code in layout page in javascript : 

$(documnet).ready(function(){        connect hub code ... })

i want disconnect user form hub , start connect again after login , validate ok. want server side inside account controller , method :

public actionresult logon(loginmodel model, string returnurl) {     if (modelstate.isvalid)     {         if (system.web.security.membership.validateuser(model.username, model.password))         {             formsauthentication.setauthcookie(model.username, false);             ....here , disconnect hub             ....to make user reconnect      }

the reason want because signalr throws error if user changed authenticated after login , connection remains . error is:

the connection id in incorrect format.

you cannot stop , start signalr connections server. need call 

$.connection.hub.stop(); //on client before user attempts log on , call  $.connection.hub.start(); //after log on attempt has completed.

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