Updates 家长端服务/接口文档.md

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@@ -23,13 +23,15 @@ POST https://api.boxfish.cn/signup
 
 登录 
 
+```
 POST https://api.boxfish.cn/login 
-
 ```
-参数 :
-  username: user161116141352CJHaqctY
 
-  返回值：
+参数 
+
+  username: user161116141352CJHaqctY
+返回值：
+```json
     {
       "access_token": "CxCIFCdSFu",
       "id": 70904,