Replace create methods with method missing

object_creation_methods.diff

-  def create_user(overrides = {})
-    new_user(overrides).tap(&:save!)
-  end
-
 
   private
 
+  def method_missing(method, *args)
+    if method.to_s =~ /^create_(.+)$/
+      send("new_#{$1}", *args).tap(&:save!)
+    else
+      super
+    end
+  end
+