Using base_url for API regeneration POST url

lib/assets/javascripts/cartodb/keys/entry.js

@@ -51,8 +51,7 @@ $(function() {
 
     $('.js-regenerateApiKey').bind('click', function(ev) {
       if (ev) ev.preventDefault();
-      var username = user_data.username;
-      var action = (user_data.organization ? '/u/' + username : '') + '/your_apps/api_key/regenerate';
+      var action = currentUser.get('base_url') + '/your_apps/api_key/regenerate';
       var authenticity_token = $('[name=authenticity_token][value]').get(0).value;
       var dlg = new RegenerateKeysDialog({
         type: 'api',
@@ -66,8 +65,7 @@ $(function() {
 
     $('.js-regenerateOauth').bind('click', function(ev) {
       if (ev) ev.preventDefault();
-      var username = user_data.username;
-      var action = (user_data.organization ? '/u/' + username : '') + '/your_apps/oauth/regenerate';
+      var action = currentUser.get('base_url') + '/your_apps/oauth/regenerate';
       var authenticity_token = $('[name=authenticity_token][value]').get(0).value;
       var dlg = new RegenerateKeysDialog({
         type: 'oauth',