https://medium.com/nurigo/솔라피-oauth2-연동-node-express를-이용하여-앱-만들기-ca02dc2f4231

index.js

const request = require('request-promise')

app.get('/authorize', (req, res) => {
  const { code } = req.query
  const result = await request({
    method: 'POST',
    uri: 'https://api.solapi.net/oauth2/v1/access_token',
    body: {
      code,
      grant_type: 'authorization_code',
      client_id: 'CIDPL49TEFPSPLZS',
      client_secret: 'PQKQ0FKPLVFYIYIG3LZEVWB0B9WTZXNQ',
      redirect_uri: 'http://localhost:8080/authorize'
    },
    json: true
  })
  console.log(result)
})