auth asks the API's server for a session ID (SID), which you can then pass along to either query_wos or pull_wos. Note, there are limits on how many session IDs you can get in a given period of time (roughly 5 SIDs in a 5 minute period).

auth(username = Sys.getenv("WOS_USERNAME"),
password = Sys.getenv("WOS_PASSWORD"))

## Arguments

username Your username. Specify username = NULL if you want to use IP-based authentication. Your password. Specify password = NULL if you want to use IP-based authentication.

A session ID

## Examples

# NOT RUN {
# Pass user credentials in manually:
# }