```

Prettified Response:

```xml
<?xml version="1.0" encoding="UTF-8"?>
<AssumeRoleWithCustomTokenResponse xmlns="https://sts.amazonaws.com/doc/2011-06-15/">
  <AssumeRoleWithCustomTokenResult>
    <Credentials>
      <AccessKeyId>24Y5H9VHE14H47GEOKCX</AccessKeyId>

		RequestID string `xml:"RequestId,omitempty"`
	} `xml:"ResponseMetadata,omitempty"`
}

// AssumeRoleWithCustomTokenResponse contains the result of a successful
// AssumeRoleWithCustomToken request.
type AssumeRoleWithCustomTokenResponse struct {
	XMLName xml.Name `xml:"https://sts.amazonaws.com/doc/2011-06-15/ AssumeRoleWithCustomTokenResponse" json:"-"`
	Result  struct {
		Credentials auth.Credentials `xml:"Credentials,omitempty"`

			SecretKey:    tmpCredentials.SecretKey,
			SessionToken: tmpCredentials.SessionToken,
			ParentUser:   tmpCredentials.ParentUser,
		},
		UpdatedAt: updatedAt,
	}))

	response := new(AssumeRoleWithCustomTokenResponse)
	response.Result.Credentials = tmpCredentials
	response.Result.AssumedUser = parentUser
	response.Metadata.RequestID = w.Header().Get(xhttp.AmzRequestID)
	writeSuccessResponseXML(w, encodeResponse(response))