first commit, i i have no idea what i have done

server/internal/models/user.go

@@ -0,0 +1,20 @@
+package models
+
+import "time"
+
+type Role string
+
+const (
+	RoleAdmin Role = "admin"
+	RoleUser  Role = "user"
+)
+
+type User struct {
+	ID        uint     `gorm:"primaryKey"`
+	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"`
+	CreatedAt time.Time
+	UpdatedAt time.Time
+}