By default, key values are masked so that they are not exposed in console
output or logs: only the first four characters of keys longer than eight
characters are shown. Use mask = FALSE to print complete keys, or
getAPIKey() to retrieve them programmatically.
setAPIKey("exampleProvider", "abcd1234efgh5678")
# Keys are masked by defaultshowAPIKeys()
showAPIKeys(mask = FALSE)
# Remove the example keysetAPIKey("exampleProvider", NULL)