无法使用来自 AWS 的 CognitoIdentityServiceProvider SDK

Question

I'm currently using amazon-cognito-identity-js and CognitoIdentityServiceProvider

and following this article https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/CognitoIdentityServiceProvider.html

When calling listUsersInGroup function I'm initializing the this.cognitoProvider with accessKeyId and secretAccessKey

Is there a way I can use the CognitoIdentityServiceProvider without specifying accessKeyId and secretAccessKey ? I don't want to specify these keys since it contains sensitive information

This works

import { Config, CognitoIdentityCredentials, CognitoIdentityServiceProvider } from "aws-sdk";

export default class CognitoAuth {

   configure(config) {
     if (typeof config !== 'object' || Array.isArray(config)) {
       throw new Error('[CognitoAuth error] valid option object required')
     }
    
     this.userPool = new CognitoUserPool({
       UserPoolId: config.IDENTITY_POOL_ID,
       ClientId: config.CLIENT_ID
     })

     this.cognitoProvider = new CognitoIdentityServiceProvider({
       region: config.REGION,
       accessKeyId: config.ACCESS_KEY_ID,
       secretAccessKey: config.SECRET_ACCESS_KEY
     });

    Config.region = config.REGION

    Config.credentials = new CognitoIdentityCredentials({
      IdentityPoolId: config.IDENTITY_POOL_ID
    })

    this.options = config

   }

   getUsersInGroup(context, cb) {
     var params = {
       GroupName: context.group,
       UserPoolId: this.options.IDENTITY_POOL_ID
     };

     this.cognitoProvider.listUsersInGroup(params, (err, data) => {
       if (err) console.log(err, err.stack)
       else cb(null, data.Users)
     })
   }
  
}

This don't work

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

but I'm getting error ConfigError: Missing region in config

Answer 1

As per your linked documentation page, calling the listUsersInGroup requires developer credentials, so these must be provided somehow.

If you look at Setting credentials in Node.js , there are different ways to pass them, eg, if running this function on a Lambda (or on an EC2 instance), it will use the Lambda (or EC2 instance) role permissions to call the method and credentials never have to be passed. Other options are using environment variables ( AWS_ACCESS_KEY_ID / AWS_SECRET_ACCESS_KEY ) or shared credentials file.

However, your immediate problem seems to be regarding the region. While in the working block it is passed with region: config.REGION, , it is missing from the non working block. You can fix that by passing the region parameter when instantiating CognitoIdentityServiceProvider:

this.cognitoProvider = new AWS.CognitoIdentityServiceProvider({ 
  apiVersion: '2016-04-18', 
  region: 'us-east-1' // use your region
});