To cite package ‘sg’ in publications use:

  Ağın B (2024). _sg: 'SendGrid' Email API Client_. R package version
  0.2.0.9000, , <https://github.com/botan/sg>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {sg: 'SendGrid' Email API Client},
    author = {Botan Ağın},
    year = {2024},
    note = {R package version 0.2.0.9000, },
    url = {https://github.com/botan/sg},
  }