To cite package ‘getPass’ in publications use:

  Schmidt D, Chen W (????). “getPass: Masked User Input.” R package
  version 0.2-4, <https://cran.r-project.org/package=getPass>.

A BibTeX entry for LaTeX users is

  @Misc{getPassPackage,
    title = {{getPass}: Masked User Input},
    author = {Drew Schmidt and Wei-Chen Chen},
    note = {{R} package version 0.2-4},
    url = {https://cran.r-project.org/package=getPass},
  }

  Schmidt D (????). _Guide to the getPass Package_. R Vignette,
  <https://cran.r-project.org/package=getPass>.

A BibTeX entry for LaTeX users is

  @Manual{getPassVignette,
    title = {Guide to the {getPass} Package},
    author = {Drew Schmidt},
    note = {{R} Vignette},
    url = {https://cran.r-project.org/package=getPass},
  }