CognitoAuthLoginLambda

CognitoAuthLoginLambda.js

console.log('Loading Function')

// Dependencies
const AWS = require('aws-sdk')

// Functions
const getToken = userId => {
  const cognito = new AWS.CognitoIdentity({ apiVersion: '2014-06-30' })
  const params = {
    IdentityPoolId: '...',
    Logins: {
      'login.alljoint.CognitoAuth': userId
    }
  }

  return cognito.getOpenIdTokenForDeveloperIdentity(params).promise()
}

exports.handler = (event, context, callback) => {
  const userId = 'UserA'

  getToken('UserA')
    .then(data => {
      const response = {
        statusCode: 200,
        body: JSON.stringify({
          message: 'Success',
          userId,
          data,
          input: event
        }, null, 4)
      }

      callback(null, response)
    })
}