Improved UX on login for new users

Builder/IISMainHandler/build.txt

@@ -1 +1 @@
-820
+822

IISMainHandler/handlers/request/LoginHandler.cs

@@ -29,6 +29,15 @@ namespace FLocal.IISHandler.handlers.request {
 		}
 
 		protected override XElement[] Do(WebContext context) {
+			
+			try {
+				Account tmpAccount = Account.LoadByName(context.httprequest.Form["name"]);
+				if(tmpAccount.needsMigration) {
+					throw new RedirectException("/MigrateAccount/" + context.httprequest.Form["name"]);
+				}
+			} catch(NotFoundInDBException) {
+			}
+
 			Account account = Account.tryAuthorize(context.httprequest.Form["name"], context.httprequest.Form["password"]);
 			Session session = Session.create(account);
 

IISMainHandler/handlers/response/MigrateAccountHandler.cs

@@ -18,7 +18,7 @@ namespace FLocal.IISHandler.handlers.response {
 
 		protected override System.Xml.Linq.XElement[] getSpecificData(WebContext context) {
 			string username;
-			if(context.httprequest.Form["username"] != "") {
+			if(context.httprequest.Form["username"] != null && context.httprequest.Form["username"] != "") {
 				username = context.httprequest.Form["username"];
 			} else {
 				if(context.requestParts.Length != 2) {