function kdfimport { kdf } from "https://deno.land/x/dynamodb@v1.0.0/client/aws_signature_v4.ts"; kdf(key: string | Uint8Array,dateStamp: Date | string,region: string,service: string,keyInputEncoding?: string,outputEncoding?: string,): string | Uint8ArrayCreates a key for generating an aws signature version 4. Parameterskey: string | Uint8ArraydateStamp: Date | stringregion: stringservice: stringoptionalkeyInputEncoding: stringoptionaloutputEncoding: stringReturnsstring | Uint8Array