Amplify-js: Unknown error, the response body from fetch is: undefined

[isamsamet]

I am using in Node.js the following versions
"amazon-cognito-identity-js": "^2.0.29",
"node-fetch": "^2.2.0",

I am trying to signUp and authenticateUser in my app.

Initially I was getting "fetch undefined" when I call singUp. Which was fixed by adding the node-fetch library. Now I can successfully signUp users.

Now I am getting the error "Unknown error, the response body from fetch is: undefined" when I call authenticateUser method. The code is as following.

`app.post('/login', (req, res) => {
var authenticationData = {
Username: req.body.email,
Password: req.body.password,
};

    var authenticationDetails = new AmazonCognitoIdentity.AuthenticationDetails(authenticationData);

    var userData = {
        Username: req.body.email,
        Pool: userPool
    };

    var cognitoUser = new AmazonCognitoIdentity.CognitoUser(userData);
    cognitoUser.authenticateUser(authenticationDetails, {
        onSuccess: function (result) {
            var accessToken = result.getAccessToken().getJwtToken();

            /* Use the idToken for Logins Map when Federating User Pools with identity pools or when passing through an Authorization Header to an API Gateway Authorizer*/
            var idToken = result.idToken.jwtToken;
        },
        onFailure: function (err) {
            console.log(err);
        }
    });`

[sanudatta11]

I am in the same issue

[mattbryce93]

I am using in Node.js the following versions
"amazon-cognito-identity-js": "^2.0.29",
"node-fetch": "^2.2.0",

I am trying to signUp and authenticateUser in my app.

Initially I was getting "fetch undefined" when I call singUp. Which was fixed by adding the node-fetch library. Now I can successfully signUp users.

Now I am getting the error "Unknown error, the response body from fetch is: undefined" when I call authenticateUser method. The code is as following.

`app.post('/login', (req, res) => {
var authenticationData = {
Username: req.body.email,
Password: req.body.password,
};

    var authenticationDetails = new AmazonCognitoIdentity.AuthenticationDetails(authenticationData);

    var userData = {
        Username: req.body.email,
        Pool: userPool
    };

    var cognitoUser = new AmazonCognitoIdentity.CognitoUser(userData);
    cognitoUser.authenticateUser(authenticationDetails, {
        onSuccess: function (result) {
            var accessToken = result.getAccessToken().getJwtToken();

            /* Use the idToken for Logins Map when Federating User Pools with identity pools or when passing through an Authorization Header to an API Gateway Authorizer*/
            var idToken = result.idToken.jwtToken;
        },
        onFailure: function (err) {
            console.log(err);
        }
    });`

@isamsamet Try adding this within the authenticate user function and use the log to to see what is needing defined:

      mfaSetup: function(challengeName, challengeParameters) {
        console.log('mfaSetup');
      },
      // @ts-ignore
      associateSecretCode : function(secretCode) {
        console.log('associateSecretCode');
      },

      selectMFAType : function(challengeName, challengeParameters) {
        console.log('selectMFAType');
      },

      totpRequired : function(secretCode) {
        console.log('totpRequired');
      },

      mfaRequired: function (codeDeliveryDetails) {
        console.log('mfaRequired');
      }

Some of these will be required depending on the User Pool configuration. Have a look at use case 23 and 27 for how these blocks should be configured. Use cases here.

[sanudatta11]

I removed the remember device and set it to no. It worked.

[PrashantTapase]

I removed the remember device and set it to no. It worked.

working

[powerful23]

Closing the issue as you will no longer receive unknown error in the latest version.