Lambda function specified as a Destination is not being triggered - amazon-web-services

Question

I have a lambda function that verifies user credentials. Upon success it should call another lambda function, as a destination, that generates a token. When I test the first function, it is successful but it does not call the destination which is the other lambda function. It only gives me the success message from the first function.
Function one
exports.handler = function (event, context) {
var id = event.email;
var params = {
TableName: "User",
KeyConditionExpression: "#email = :email",
ExpressionAttributeNames:{
"#email": "email",
},
ExpressionAttributeValues: {
":email": {S: event.email},
}
};
if (id && id !== '') {
dynamo.query(params, function (err, data, callback) {
if (err) {
context.done(err);
}
else {
var user = data.Items[0];
if (user) {
var encryptedParams = {
CiphertextBlob: Buffer.from(user.password.B),
};
kms.decrypt(encryptedParams, function (err, decrypteddata) {
if (err) {
console.log(err, err.stack);
context.done(err);
}
else {
if(event.password == decrypteddata.Plaintext.toString()) {
console.log("User authenticated");
}
}
});
}
}
});
}
else {
return {
statusCode: 400,
body: "No email provided."
}
}
};
Function two
exports.handler = async (event) => {
var expires = moment().add('days', 7).valueOf();
var token = jwt.encode({
iss: event.email,
exp: expires
}, app.get('jwtTokenSecret'));
const response = {
token: token,
express: expires,
statusCode: 200
};
console.log("token granted");
return response;
};

Answer 1

Your code doesn't seem to be indicating when a successful execution has been completed. Destinations needs the "OnSuccess" indicator to determine which destination to trigger. This is possibly why the second function is not being executed.
See: Lambda Destinations: What We Learned the Hard Way - CloudProse - Trek10 Blog