Unmarshalling Error: cvc-complex-type.2.4.a: Invalid content was found starting with element '{"https://adwords.google.com/api/adwords/cm/v201809":query}'. One of '{"https://adwords.google.com/api/adwords/cm/v201809":serviceSelector}' is expected.

[Jared-Dahlke]

Hello and thank you for the package Chris! I finally managed to get the authentication working but am now getting an error. Here is my code, followed by the error:

const AdwordsUser = require('node-adwords').AdwordsUser;
const refreshToken = '1/adsfasdfadadfadfadfadfadf'
const keys = require('../../GoogleAdsApiCredentials.json');
const {JWT} = require('google-auth-library');

`const client = new JWT(
      keys.client_email,
      null,
      keys.private_key,
      ['https://www.googleapis.com/auth/adwords'],
    );
    const mytoken = await client.getAccessToken();
    client.refreshToken(refreshToken)   
    let user = new AdwordsUser({
      developerToken:  keys.devToken, //your adwords developerToken
      userAgent: 'myCompanyNqme', //any company name
      clientCustomerId: '111-111-1111',  //the Adwords Account id (e.g. 123-123-123)
      client_id: '1231231231-4tao4aeumsg0hadsfasdfanpve.apps.googleusercontent.com', //this is the api console client_id
      client_secret: 'adshjkflajsldfjaldjhfla',
      refresh_token: refreshToken, 
      access_token: mytoken.token
    });

    let campaignService = user.getService('CampaignService', 'v201809')
   
    let params = {
      query: 'SELECT Id, Name'
  };
   
  campaignService.get(params, (error, result) => {
    //console.log(JSON.stringify(result));
    console.log(error)
  })

here is the request body that the above code generates using this library:
body: '<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tns="https://adwords.google.com/api/adwords/cm/v201809" xmlns:jaxb="http://java.sun.com/xml/ns/jaxb"><soap:Header><ns1:RequestHeader xmlns:ns1="https://adwords.google.com/api/adwords/cm/v201809" xmlns="https://adwords.google.com/api/adwords/cm/v201809"><ns1:developerToken>adfadadffadf</ns1:developerToken><ns1:userAgent>Sightly</ns1:userAgent><ns1:validateOnly>false</ns1:validateOnly><ns1:clientCustomerId>111-111-1111</ns1:clientCustomerId></ns1:RequestHeader></soap:Header><soap:Body><get xmlns="https://adwords.google.com/api/adwords/cm/v201809"><query>SELECT Id, Name</query></get></soap:Body></soap:Envelope>'

and finally the error I am getting when I call this is below:
toJSON: [Function: responseToJSON],
caseless: Caseless { dict: [Object] },
body: <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"><soap:Body><soap:Fault><faultcode>soap:Client</faultcode><faultstring>Unmarshalling Error: cvc-complex-type.2.4.a: Invalid content was found starting with element '{"https://adwords.google.com/api/adwords/cm/v201809":query}'. One of '{"https://adwords.google.com/api/adwords/cm/v201809":serviceSelector}' is expected. </faultstring></soap:Fault></soap:Body></soap:Envelope>
},
body: <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"><soap:Body><soap:Fault><faultcode>soap:Client</faultcode><faultstring>Unmarshalling Error: cvc-complex-type.2.4.a: Invalid content was found starting with element '{"https://adwords.google.com/api/adwords/cm/v201809":query}'. One of '{"https://adwords.google.com/api/adwords/cm/v201809":serviceSelector}' is expected. </faultstring></soap:Fault></soap:Body></soap:Envelope>
}
Hopefully someone can help. Thank you

[jtiscione]

It looks like Google broke this library. Even the README code throws this error.