Where to retrieve Encryption Key of user

Where do we retrieve the encryption key of the user

I am trying to access images. Docs say use an encryption key from the user. All we have is an access_token.

When and where do we retreive this encryption key? Using Platform API, not chat SDK

Please refer to this link:

I guess what you are looking for is related to this parameter require_auth when sending a file:

When you then list your messages, you should have one of the attributes in the resulting JSON with a URL including this auth=XXXX

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@walter.rodriguez I don’t see an auth=XXX anywhere in our messages responses:

@walter.rodriguez spent some time this weekend and could not find any messages with an auth=xxx assigned. can you please advise? is it possible to disable this requirement for our account?

@walter.rodriguez Still seeing the same issue. Do you have any suggestions?

If your URL needs authorization, you can download it using your Api-Token (you get it from your Sendbird Dashboard). This is an example using Javascript:

  1. Let’s say that your message object is message. And the URL you want to access is plainUrl
  2. Your file type is: message.type
  3. To be able to download this file you need to do something like:
    var url = message.plainUrl; // This is the URL from Sendbird which needs authorization
    var headers = new Headers({
        'Api-Token': 'YOUR-API-TOKEN'
    var options = {
        method: 'GET',
        headers: headers,
        mode: 'cors',
        cache: 'default'
    var request = new Request(url);    
    fetch(request, options).then((response) => {
        response.arrayBuffer().then((buffer) => {
            var base64Flag = 'data:' + message.type + ';base64,';
            var imageStr = arrayBufferToBase64(buffer);
            // <img src="${ base64Flag + imageStr }" /> // This will show an image file

And then, for the arrayBufferToBase64 function:

function arrayBufferToBase64(buffer) {
    var binary = '';
    var bytes = [].slice.call(new Uint8Array(buffer));
    bytes.forEach((b) => binary += String.fromCharCode(b));
    return window.btoa(binary);

If you are downloading another format (let’s say a PDF file):

    fetch(request, options).then((response) => {
        console.dir( response ); // Check the full response object
        console.log( response.url ); // This is the URL to download
        // Download automatically
        var a = document.createElement('a');
        a.href = url;
        a.download = fileName;