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Example url from our https://graebert.atlassian.net/wiki/spaces/KUDOPARTNER/pages/1183154352/Samples#2.-Open-file-for-editing-from-S3-bucket-with-customized-style : https://app.kudo.graebert.com/editor?file=demo3.dwg&auth=demo3&userId=demouser
To open a file from the S3 bucket with Kudo, you need to make sure that Kudo has at least read access to it. This will be sufficient if you use Kudo only as a viewer. If you use Kudo in edit mode, it will also require write access.