doc api

@@ -139,3 +139,22 @@ public static class WxUserInfo {
 }
 ```
 
+
+##### 6. 缺用户是否已经建立过绑定关系，如果建立过，返回之前绑定关系的邀请码
+
+- URL: {{localhost}}/boxfish-online-card/wxUser/confirm?openId={{openId}}
+- Method: GET
+- Requestparam: `openId`
+
+- ResponseBody:
+
+```java
+public static class Response {
+    // status
+    private ResponseStatus status;
+    private String message;
+
+    private Boolean flagUserHasInvitationCode;
+    private Long invitationCode;
+}
+```
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