Fetches the list of countries (ISO 3166-1) recognized by the GLEIF API.
Examples
# \donttest{
head(lei_countries())
#> code name
#> 1 AD Andorra
#> 2 AE United Arab Emirates (the)
#> 3 AF Afghanistan
#> 4 AG Antigua and Barbuda
#> 5 AI Anguilla
#> 6 AL Albania
# }