nl_tokens: merge send data with authorization data remove all undefined values
pl_tokens: function sanitize ( sender , <mask> ) { data = _ . defaults ( { } , { client_id : sender . client_id , client_secret : sender . client_secret } , data ) ; return _ . reduce ( data , function ( acc , value , key ) { if ( ! _ . isUndefined ( value ) ) { acc [ key ] = value ; } return acc ; } , { } ) ; }