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type MakeUrl = (p: {  txt: string;  targetLang: string;}) => string;const makeUrl: MakeUrl = (p) =>  `https://api-free.deepl.com/v2/translate?text=${    encodeURI(p.txt)  }&target_lang=${p.targetLang}`;
type TranslateResponse =  | null  | {    translations: Array<{      detected_source_language: "EN";      text: string;    }>;  };
type Translate = (p: {  txt: string;  targetLang: string;  translateAuthKey: string;}) => Promise<string | void | undefined>;/** * @see https://www.deepl.com/docs-api/translate-text/translate-text/ */export const translate: Translate = (p) =>  fetch(makeUrl(p), {    method: "POST",    headers: {      Authorization: `DeepL-Auth-Key ${p.translateAuthKey}`,    },  })    .then<TranslateResponse>((v) => v.ok ? v.json() : null)    .then((v) => v?.translations.at(0)?.text)    .catch(console.error);