When DataSailr is available on CRAN, please use the following code to install. (When there are problems to fix, the package may be archived and not available on CRAN.)
# After running R
install.packages("datasailr")
Another way is to download a binary package and install it.
# Linux
R CMD INSTALL <datasailr_package>.tar.gz
# Windows
R CMD INSTALL <datasailr_package>.zip