Vendor Folder Alternate! for SugarCRM ondemand (9.x)

Hey community,

Really need your wise help into this matter. I am building extensions for SugarCRM oncloud( *.sugarondemand.com). Twilio is the first one.

Because of code restriction, Twilio Vendor folder is not getting accepted. 

So what is the best way to do that? Usually, most of custom API coming with "Vendor" directory.