for data we use this api https://data.world/dr5hn/country-state-city
countries = {
name,
code,
timezones,
}
states = {
name,
code,
country_code,
}
cities = {
index,
name,
state_code,
country_code,
}
/api/locations/countries => countries
/api/locations/:country/states => countries
/api/locations/:country/:state/cities => countries