Get Cognito User Token

.env

COGNITO_CLIENT_ID=<cognito client id>
COGNITO_USER_POOL_ID=<cognito user pool id>
COGNITO_USERNAME=<cognito username>
COGNITO_PASSWORD=<cognito user password>

getCognitoToken.js

const AWS = require('aws-sdk')

const clientId = process.env.COGNITO_CLIENT_ID
const userPoolId = process.env.COGNITO_USER_POOL_ID
const username = process.env.COGNITO_USERNAME
const password = process.env.COGNITO_PASSWORD

const cognito = new AWS.CognitoIdentityServiceProvider({
  apiVersion: '2016-04-18'
})

const getToken = async authParams => {
  let result = {}
  try {

    const params = {
      AuthFlow: 'ADMIN_USER_PASSWORD_AUTH',
      ClientId: clientId,
      UserPoolId: userPoolId,
      AuthParameters: {
        USERNAME: username,
        PASSWORD: password
      }
    }

    const authRequest = await cognito.adminInitiateAuth(params).promise()
    result = authRequest.AuthenticationResult
  } catch (error) {
    console.error('getCognitoToken', error)
  }
  return result
}

module.exports = getToken