Sets the API key for accessing the WaniKani API. The key can be provided directly or will be read from the WANIKANI_API_KEY environment variable.
Examples
if (FALSE) { # \dontrun{
# Set API key directly
wk_set_api_key("your-api-key-here")
# Or set via environment variable
Sys.setenv(WANIKANI_API_KEY = "your-api-key-here")
wk_set_api_key()
} # }