当我试图在.env文件中添加安全API密钥时，我得到了这个错误。

node:internal/errors:464
    ErrorCaptureStackTrace(err);
    ^

TypeError [ERR_HTTP_INVALID_HEADER_VALUE]: Invalid value "undefined" for header "X-RapidAPI-Host"
    at ClientRequest.setHeader (node:_http_outgoing:579:3)
    at new ClientRequest (node:_http_client:256:14)
    at Object.request (node:https:353:10)

下面是我的代码：

const axios = require("axios");

const BASE_URL = `https://mashape-community-urban-dictionary.p.rapidapi.com`

module.exports = {
    getCompatibility: (yourSearch) => axios({
        method:"GET",
        url : BASE_URL + `/define`,
        headers: {
          'X-RapidAPI-Host': process.env.rapidapi_host,
          'X-RapidAPI-Key': process.env.Rrapidapi_key
        },
        params: {
            term: yourSearch
        }
    })
}

我的env文件：

rapidapi_host={my secure host}
rapidapi_key={my secure key}

型
有人能解释为什么会发生这种情况吗？