title: s3 bucket policy to allow iam user to upload image
body: <p>I have a bucket named <strong>prod-mysite-me</strong> on my s3. Within the bucket I have a folder named <strong>avatars</strong>. And inside the avatars folder there are several email_address folders and within each the the image file resides</p>
  
  <p>For clearer explanation this is the structure of the bucket</p>
  
  <pre><code>prod-mysite-me/
   - avatars/
    - email_address1.@domain.com
      - image1.jpg
    - email_address2@domain.com
      - image1.jpg
    so on ...
  </code></pre>
  
  <p>Now what I want is to be able to have a permission to upload on <strong>prod-mysite-me/avatars/my_email@domain.com/my_image.jpg</strong>. Sorry this is my first time experiencing S3 uploading. </p>