Migration link:
https://accountmigration.leagueoflegends.com/en-sg/welcome/

Account creation link:
https://auth.riotgames.com/login#acr_values=urn%3Ariot%3Agold&client_id=accountodactyl-prod&redirect_uri=https%3A%2F%2Faccount.riotgames.com%2Foauth2%2Flog-in&response_type=code&scope=openid%20email%20profile%20riot%3A%2F%2Friot.atlas%2Faccounts.edit%20riot%3A%2F%2Friot.atlas%2Faccounts%2Fpassword.edit%20riot%3A%2F%2Friot.atlas%2Faccounts%2Femail.edit%20riot%3A%2F%2Friot.atlas%2Faccounts.auth%20riot%3A%2F%2Fthird_party.revoke%20riot%3A%2F%2Fthird_party.query%20riot%3A%2F%2Fforgetme%2Fnotify.write%20riot%3A%2F%2Friot.authenticator%2Fauth.code%20riot%3A%2F%2Friot.authenticator%2Fauthz.edit%20riot%3A%2F%2Frso%2Fmfa%2Fdevice.write&state=8b95453f-df16-49c3-ae84-3ca9def738c3