Asp.net Identity - Showing the FirstName instead of username at loggedin users

Hi All,
just a quick question. Do you have any documentation to share or to point me to if I want to show to a logged-in user his or her name instead of his or her username?
I am using visual studio 2013 and using asp.net identity with webforms.
The default code looks like this:
<asp:LoginView runat="server" ViewStateMode="Disabled"> <AnonymousTemplate> <li class="signin"><a runat="server" href="~/account/login">SIGN IN</a> </li> </AnonymousTemplate> <LoggedInTemplate> <li class="signedin"> <a runat="server" href="~/account/manage"> Hi <%: Context.User.Identity.GetUserName() %></a> <ul class="mysubmenu"> <li><a runat="server" href="~/account/manage">Manage your account</a> <span class=" ...