HMAC-SHA-256 return key(s) — validate kr-hash-key: "sha256_hmac" (browser).
kr-hash-key: "sha256_hmac"
REST API password(s) — validate kr-hash-key: "password" (IPN).
kr-hash-key: "password"
HMAC-SHA-256 return key(s) — validate
kr-hash-key: "sha256_hmac"(browser).