增加用户身份认证相关接口

internal/db/models/user_identity_model_ext.go

@@ -0,0 +1,16 @@
+package models
+
+import "encoding/json"
+
+func (this *UserIdentity) DecodeFileIds() []int64 {
+	if len(this.FileIds) == 0 {
+		return []int64{}
+	}
+
+	var result = []int64{}
+	err := json.Unmarshal(this.FileIds, &result)
+	if err != nil {
+		// ignore error
+	}
+	return result
+}