balthasar's workaround appears to work great! Thanks for the help. I'm not too familiar with APIs, so it took a while to figure out what was going wrong. This might be helpful to someone that isn't too family with API keys:
install.packages("usethis")
require(usethis)
usethis::edit_r_environ()
# A .Renvrion window will open. Add the following to the .Renviron and don't forget to click save:
EDGARWEBR_USER_AGENT = "XXXX"
#Run the rest of balthasars' code to access EDGAR
balthasar's workaround appears to work great! Thanks for the help. I'm not too familiar with APIs, so it took a while to figure out what was going wrong. This might be helpful to someone that isn't too family with API keys: