title: multipart boundary not found - aws api gateway
body: <p>I have created AWS API-Gateway and I am trying to upload an image using Postman but I received an error of <strong>Multipart: boundary not found.</strong></p>
  
  <p>I have tried below solution for this issue whereas I created model for API as follows:</p>
  
  <pre><code>Model name: fileupload
  Content type: image/png
  
  Model schema:
  {
     "$schema": "http://json-schema.org/draft-04/schema#",
     "title": "UserAccountUpdate",
     "type": "object",
     "properties": {
     "user": {
        "type": "object",
        "properties": {
            "avatar": { "type": "string" },
            "username": { "type": "string" }
       }
     }
    }
  }
  </code></pre>
  
  <p>But, this didn't worked.</p>
  
  <p>I expect my image to get uploaded but it receives an error of <strong>Multipart: boundary not found.</strong>. Please Help me to resolve this issue, Thanks.</p>