title: Kairos API : subject_id one or more required parameters are missing
body: <p>I'm trying to enroll person profile pic's using <a href="https://kairos.docs.apiary.io/#reference/face-recognition" rel="nofollow noreferrer">kairos</a> API. I have a following python code. </p>
  
  <p><strong>My python script:</strong></p>
  
  <pre><code>#!/usr/bin/python3
  
  import requests
  import io
  import http.client
  import base64
  import json
  import glob, os
  from os.path import basename
  
  dir_path = "/home/Kairos/profiles/msc/" 
  
  os.chdir(dir_path)
  
  for file in glob.glob("*.*"):
      img_path = file
      print(img_path)
      files = {'image': (img_path, open(dir_path + img_path, 'rb'), 'image/jpg', {'Expires': '0'})}
  
      headers = {
          'app_id': "xxxx",
          'app_key': "xxxxxxxxxxxxxxxxxxxxxx",
      }
  
      values_enrol = {
         'subject_id':'msc',
         'gallery_name':'mscGallary'
      }
  
      res = requests.post('https://api.kairos.com/enroll', headers=headers, files=files, data=values_enrol)
  
      print(res.content)
  </code></pre>
  
  <p>But, I'm getting an error :</p>
  
  <pre><code> "Errors": [
          {
              "ErrCode": 1002,
              "Message": "subject_id one or more required parameters are missing"
          },
          {
              "ErrCode": 1002,
              "Message": "gallery_name one or more required parameters are missing"
          }
      ]
  }
  </code></pre>
  
  <p>What am I doing wrong here? Please someone help me.</p>
  
  <p>Thanks in advance.</p>