.onAttach <- function(libname, pkgname) {

  version <- utils::packageDescription(pkgname, fields = "Version")

  msg <- paste0("=========================================================================================

", pkgname, " version ", version, "

Project URL: https://github.com/ropensci/UCSCXenaTools

Usages: https://cran.r-project.org/web/packages/UCSCXenaTools/vignettes/USCSXenaTools.html

If you use it in published research, please cite:

Wang et al., (2019). The UCSCXenaTools R package: a toolkit for accessing genomics data

  from UCSC Xena platform, from cancer multi-omics to single-cell RNA-seq.

  Journal of Open Source Software, 4(40), 1627, https://doi.org/10.21105/joss.01627

=========================================================================================

                              --Enjoy it--")

  # Init API functions

  .init_api()

  base::packageStartupMessage(msg)

}