Facebank OAuth Integration Guide: AWS Cognito Authenticate with ClientMetadata

CognitoAuthenticate.js

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import { 
  AuthenticationDetails, 
  CognitoUser, 
  CognitoUserPool 
} from "amazon-cognito-identity-js"; 

/**
 * The key of client metadata you pass to the cognito's authenticate method
 */
const EXTERNAL_IDENTITY_LINK_CLIENT_METADATA_KEY = 'CONFIRM_IDENTITY_LINK';

const CognitoConfig = { 
  UserPoolId: '****',
  ClientId: '****', 
} 

/**
 * Performs authentication via Cognito SDK
 * @param {String} username, cognito username
 * @param {String} password, cognito password
 * @param {String} externalIdentityToken, token received as error message from Facebank OAuth work-flow
 */
const authenticateWithCognito = async (username, password, token) => { 
    const authenticationData = { 
      Username: username, 
      Password: password
    }; 

    if (externalIdentityToken !== undefined) {
      authenticationData.ClientMetadata = { [ EXTERNAL_IDENTITY_LINK_CLIENT_METADATA_KEY ]: externalIdentityToken };
    } 

    const authDetails = new AuthenticationDetails(authenticationData); 
    const userPool = new CognitoUserPool(CognitoConfig); 
    const userData = { 
      Username: username, 
      Pool: userPool,
    }; 
    const congnitoUser = new CognitoUser(userData); 

    return new Promise((resolve, reject) => { 
      congnitoUser.authenticateUser(authDetails, { 
        onSuccess: (authResponse => { 
          resolve(); 
        }), 
        onFailure: (error) => { 
          reject(err)
        }, 
      }); 
    }); 
  }
 
 export {
   loginWithCognito
 }