# 创建servicelayer连接器
1. 新建SAPLogin函数用于自定义认证，函数配置如下： 
   ![](https://support.huaweicloud.com/bestpractice-sparkpack/zh-cn_image_0000001745219553.png)
   函数代码如下：
   ```
   # -*- coding:utf-8 -*-
   import json
   import base64
   import requests
   from requests.packages.urllib3.exceptions import InsecureRequestWarning
   requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
   """"
   mssiAuthData参数样例
   {
        "header":{}, // 连接器认证header参数
        "path": {}, // 连接器认证path参数
        "query":{}, // 连接器认证query参数
        "body":{}, // 连接器认证body参数
        "host":"https://demo.com // API主机地址
   }
   """
   def login(body, mssiAuthData):
       url = mssiAuthData.get("host") + "/b1s/v1/Login"
       headers = {'Content-Type': 'application/json'}
       if body.get("Language"):
           data = {
               "CompanyDB": body["CompanyDB"],
               "UserName": body["UserName"],
               "Password": body["Password"],
               "Language": int(body["Language"])
           }
       else:
           data = {
               "CompanyDB": body["CompanyDB"],
               "UserName": body["UserName"],
               "Password": body["Password"],
           }
       session = requests.Session()
       session.post(url, json=data, headers=headers, verify=False)
       _cookies = []
       for k, v in session.cookies.get_dict().items():
           _cookies.append(k + "=" + v)
       return {'Cookie': ';'.join(_cookies)}
   def extractRequestParam(rawValue, encoded, defaultValue):
       if encoded and rawValue:
           rawValue = str(base64.b64decode(rawValue), "utf-8")
       return json.loads(rawValue) if rawValue else defaultValue
   ## 请勿对下面的函数做修改
   def handler(event, context):
       """
       函数是方法的入口
       :param event: 执行事件（event）， 包含用户定义的函数参数以及所选择的的连接器认证相关参数
       :param context: Runtime提供的函数执行上下文
       :return:
       """
       isBase64Encoded = event.get('isBase64Encoded', False)
       inputData = extractRequestParam(event.get('body'), isBase64Encoded, {})  # 用户定义的函数参数数据
       mssiAuthData = extractRequestParam(event.get('mssiAuthData'), isBase64Encoded, {})  # 连接器认证数据
       mssiAuthData["securityToken"] = context.getToken()
       dataExtendConfig = extractRequestParam(event.get('dataExtendConfig'), isBase64Encoded, {})  # 流步骤扩展参数
       result = login(inputData, mssiAuthData)
       return json.dumps(result)
   ```
   
   
2. 新建servicelayer连接器，连接器配置如下，认证函数选择新建的SAPLogin函数： 
   ![](https://support.huaweicloud.com/bestpractice-sparkpack/zh-cn_image_0000002498546066.png)