add org structure

model/position.go

@@ -0,0 +1,8 @@
+package model
+
+type Position struct {
+	Name           string `json:"name" gorm:"unique;index"`
+	RightMask      int    `json:"right_mask"`
+	OrganizationID uint   `json:"organization_id"`
+	Users          []User `json:"users,omitempty"`
+}