Add builder_url to api/v4/me endpoint

NEWS.md

@@ -17,6 +17,7 @@ Development
 * Force CTE materialization in Ghost Tables query to improve performance [#15895](https://github.com/CartoDB/cartodb/pull/15895)
 * Adapt default Rails mail logs to JSON format [#15894](https://github.com/CartoDB/cartodb/pull/15894)
 * Fix export of Google Sheet files larger than 10MB [#15903](https://github.com/CartoDB/cartodb/pull/15903)
+* Adding `builder_url` to `api/v4/me` endpoint
 
 4.42.0 (2020-09-28)
 -------------------

app/controllers/carto/api/public/user_public_presenter.rb

@@ -19,7 +19,8 @@ module Carto
               sql: sql_api_url(@user.username),
               maps: maps_api_url(@user.username),
               import: base_rails_url,
-              auth: base_rails_url
+              auth: base_rails_url,
+              builder: base_rails_url
             }
           }
         end