I don\'t know how (or where also) to grant read and write permission to the user from AWS so users can post pictures on sample_app in production enviroment. This is final ta
In Services -> IAM, click on 1 User(s) underneath IAM Resources. Select your user you want to have the permission. In this user's profile, click onAttach User Policy. Click on Select for Amazon S3 Full Access and finally Apply Policy.