Feature Request: use env variable ^ZENODO$ for Zotero token

[rkrug]

When getting the API token from the environmental variables,

deposits/R/tokens.R

Lines 23 to 24 in bc3ca40

	e <- Sys.getenv ()
	e <- e [grep (service, names (e), ignore.case = TRUE)]

deposits/R/tokens.R

Line 30 in bc3ca40

e <- e [which (!grepl ("sandbox", names (e), ignore.case = TRUE))]

looks for all environmental variables with zenodo and not sandbox, which works fine when having only one API key for Zenodo - I have two, one for read only and one for writing. Could I suggest to check for exactly the names equals ZENODO_SANDBOX and ZENODO?

[mpadge]

Sure, could you please PR improvements to that? And then also add explicit instructions to the setup vignette. Thanks

[rkrug]

OK - Will do so beginning of next week. Please feel free to assign it to me.