feat: roles, permissions

app/model/role.go

@@ -0,0 +1,19 @@
+package model
+
+type Role struct {
+	ID          uint         `gorm:"primaryKey" json:"id"`
+	Name        string       `gorm:"size:64" json:"name"`
+	Permissions []Permission `gorm:"many2many:b2b_role_permissions;" json:"-"`
+}
+
+func (Role) TableName() string {
+	return "b2b_roles"
+}
+
+type CustomerRole string
+
+const (
+	RoleUser       CustomerRole = "user"
+	RoleAdmin      CustomerRole = "admin"
+	RoleSuperAdmin CustomerRole = "super_admin"
+)