fixed gorm shema for correct deletion and many2many relation beetween users and devices

server/internal/models/user.go

@@ -14,7 +14,7 @@ type User struct {
 	Username  string   `gorm:"uniqueIndex;size:255;not null"`
 	Password  string   `gorm:"not null"`
 	Role      Role     `gorm:"type:varchar(16);not null;default:'user'"`
-	Devices   []Device `gorm:"many2many:user_devices;joinForeignKey:ID;joinReferences:GUID"`
+	Devices   []Device `gorm:"many2many:user_devices;constraint:OnDelete:CASCADE;"`
 	CreatedAt time.Time
 	UpdatedAt time.Time
 }