Add the concept of a player and the /register endpoint

pkg/rovegame/world.go

@@ -1,5 +1,7 @@
 package rovegame
 
+import "github.com/google/uuid"
+
 // World describes a self contained universe and everything in it
 type World struct {
 	instances []Instance
@@ -7,7 +9,7 @@ type World struct {
 
 // Instance describes a single entity or instance of an entity in the world
 type Instance struct {
-	id int
+	id uuid.UUID
 }
 
 // NewWorld creates a new world object
@@ -16,9 +18,8 @@ func NewWorld() *World {
 }
 
 // Adds an instance to the game
-func (w *World) CreateInstance() int {
-	// Simple ID to start with
-	id := len(w.instances)
+func (w *World) CreateInstance() uuid.UUID {
+	id := uuid.New()
 
 	// Initialise the instance
 	instance := Instance{