package models import "gorm.io/gorm" type User struct { gorm.Model Username string `gorm:"unique"` Password string Roles []Role `gorm:"many2many:user_roles;"` } type Role struct { gorm.Model Name string `gorm:"unique"` Permissions []Permission `gorm:"many2many:role_permissions;"` } type Permission struct { gorm.Model Name string `gorm:"unique"` } type UserGroup struct { gorm.Model Name string `gorm:"unique"` Users []User `gorm:"many2many:user_group_users;"` } `