TypeScript/Express: Method still not being exported

Question

I have one method in my authentication-service.ts file that is not successfully exporting for some reason. This is what the method looks like:

interface AuthResult {
  httpCode: number;
  message: string;
}

function verifyAuth(req: Request): Promise<AuthResult> {
  return new Promise(async (resolve, reject) => {
    let verifyResult: AuthResult = {
      httpCode: 200,
      message: 'OK'
  };

const authHeader: string | undefined = req.headers["authorization"];

if (!authHeader) {
  verifyResult.httpCode = 400;
  verifyResult.message = 'missing Authorization in headers';
  reject(verifyResult);
}

let service: string | undefined = undefined;
if (Object.keys(req.headers).includes("looney-service") && !Array.isArray(req.headers["looney-service"])) {
  service = req.headers["looney-service"];
}

if (!service) {
  verifyResult.httpCode = 400;
  verifyResult.message = 'missing Looney-Service in headers';
  reject(verifyResult);
}

if (authHeader && service) {
  const token: string | null = getTokenFromAuth(authHeader);
  if (token) {
    const result: string = await verifyService(service, token).catch(err => {
      console.log('verifyAuth caught error!', err);
      return err;
    });
    if (result == 'OK') {
      verifyResult.httpCode = 200;
      verifyResult.message = result;
      resolve(verifyResult);
    } else {
      verifyResult.httpCode = 403;
      verifyResult.message = result;
      reject(verifyResult);
    }
  } else {
    verifyResult.httpCode = 403;
    verifyResult.message = 'missing token';
    reject(verifyResult);
  }
}
  });
}

export { getServiceConfig, getServicePublicKey, verifyService, genJwt, getTokenFromAuth, AuthResult, verifyAuth }

I am importing the file that this method sits in like so:

import * as auth from './services/authentication-service'

However, when I console log auth, the object does not contain the verifyAuth method:

{
  getServiceConfig: [Function: getServiceConfig]
  getServicePublicKey: [Function: getServicePublicKey]
  verifyService: [Function: verifyService]
  genJwt: [Function: genJwt]
  getTokenFromAuth: [Function: getTokenFromAuth]
}

Why is that? TypeScript is not complaining about any type reference, all that has seemingly been corrected.

If I try to write it as a class of export class Auth {} and just drop all those methods in there, of course remove the function keyword and add the reference to this. I still get an issue with verifyAuth() method, in that case it would say Property 'verifyAuth' does not exist on type typeof Auth', what is the deal with this verifyAuth` method?