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· 2 min read
Rajesh Nautiyal

Sometime you might need the list of users from AWS cognito userpool, so lets discuss how to do it? so first things is how do we check users in cognito userpool?

You can get the list of all users with listUsers function of CognitoIdentityServiceProvider

const AWS = require("aws-sdk");


function getCognitoUsers(){
    var params = {
        UserPoolId: Aws_User_Pool_Id,
    };

    var cognitoidentityserviceprovider = new AWS.CognitoIdentityServiceProvider();

    return cognitoidentityserviceprovider
    .listUsers(params)
    .promise()
    .then(async (response) => {
        return response.Users
    })
    .catch((error) => {
        console.log("cognito error", error);
    });
}

But listUsers function have some limitations it gives only 60 users in response. But good thing is that it gives PaginationToken with the response and with that pagination token you can get next 60 users from cognito userool.

So to get the all users from cognito userpool, you have to call listUsers function with PaginationToken in params. Here an example how i did it with recursive function, to get all the users from cognito userpool:

const AWS = require("aws-sdk");

// let users = [];
async function getAllCognitoUsers(paginationToken = ""){
    var params = {
        UserPoolId: Aws_User_Pool_Id,
    };

    if (paginationToken !== "") {
     params.PaginationToken = paginationToken;
    }

    var cognitoidentityserviceprovider = new AWS.CognitoIdentityServiceProvider();

    return cognitoidentityserviceprovider
    .listUsers(params)
    .promise()
    .then(async (response) => {
        if (response.Users.length < 60) {
        users.push(response.Users)
        } else {
        users.push(response.Users);
        await getAllCognitoUsers(response.PaginationToken);
        }
    })
    .catch((error) => {
        console.log("cognito error", error);
    });
}