su: ignore --preserve-environment, it's mutually exclusive to --login.

Attaching package: ‘shinydashboard’

The following object is masked from ‘package:graphics’:

    box


Attaching package: ‘shinyjs’

The following object is masked from ‘package:shiny’:

    runExample

The following objects are masked from ‘package:methods’:

    removeClass, show

Error in library(shinythemes) : there is no package called ‘shinythemes’
Calls: runApp ... sourceUTF8 -> eval -> eval -> ..stacktraceon.. -> library
Execution halted