In general, use oadoi_fetch instead. It calls this method, returning open access status information from all your requests.
oadoi_fetch_(doi =NULL, email =NULL)
Arguments
doi: character vector,a DOI
email: character vector, mandatory! Unpaywall requires your email address, so that they can track usage and notify you when something breaks. Set email address in your .Renviron file with the option roadoi_emailoptions(roadoi_email = "najko.jahn@gmail.com"). You can open your .Renviron file calling file.edit("~/.Renviron"). Save the file and restart your R session. To stop sharing your email when using rcrossref, delete it from your .Renviron file.
Returns
A tibble
Examples
## Not run:oadoi_fetch_(doi = c("10.1016/j.jbiotec.2010.07.030"))## End(Not run)