const rcsdk = new SDK({

  server: ringCentral.serverURL,

  clientId: ringCentral.clientId,

  clientSecret: ringCentral.clientSecret

})



async function getPlatformLoggedIn() {

  const platform = rcsdk.platform()

  await platform.login({ jwt: ringCentral.jwtToken })

  return platform

}



async function sendFax(input: SendFaxOptions) {

  const formData = new FormData()



  formData.append('attachment', input.attachments[0], { filename: 'correctPDF.pdf', contentType: 'application/pdf' })

  formData.append('to', JSON.stringify(input.to))

  formData.append('faxResolution', 'High')

  console.log('Logging in')

  const platform = await getPlatformLoggedIn()

  console.log('Sending Fax')

  const response = await platform.post(SEND_FAX_PATH, formData)

  console.log('response: ', JSON.stringify(response, null, 2))

}

No matter the number I send, it returns the same error message, and judging by the 400 error, I am correctly authenticated, I tried putting invalid credentials and the error happened before I tried to send the fax out.