To cite package ‘zentracloud’ in publications use:

  Stolle C, Stepper C, Detsch F, Appelhans T (2024). _zentracloud:
  Access to METER ZentraCloud API_. R package version 0.4.9, ,
  <https://gitlab.com/meter-group-inc/pubpackages>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {zentracloud: Access to METER ZentraCloud API},
    author = {Carola Stolle and Christoph Stepper and Florian Detsch and Tim Appelhans},
    year = {2024},
    note = {R package version 0.4.9, 
},
    url = {https://gitlab.com/meter-group-inc/pubpackages},
  }