Changes as per the Code Analysis Results
Created stored procedure to set default client of the user
Added the Response.Cookie for AntiForgery
Change the CLIENT constant to value type
Call user.activate method to extend the _user object.
Update the reset method to clear _user object
Moved the "X-CLIENT-APP-KEY" header to $http interceptors, so it can always send an updated CLIENT.APP_KEY
Implement the SetDefaultClient in controller, feature and service.
Redirect to Dashboard on change client and reload the auth resolve
Removed the one-way literal from data-ng-bind.
Added a check of CLIENTS length before data-ng-repeat
Added the connection string from different clients.