Add option to prevent multiple tokens per player

config.go

@@ -28,6 +28,7 @@ func initArgs() {
 	flag.BoolVar(&randomizeTokens, "random-tokens", false, "Generate tokens with some random bytes")
 	flag.StringVar(&corsHeader, "cors-header", defaultCorsHeader, "Access-Control-Allow-Origin HTTP request header")
 	flag.StringVar(&password, "entry-pwd", defaultPassword, "Password provided in POST JSON to authenticate")
+	flag.BoolVar(&reuseTokens, "reuse-tokens", false, "Generate a single token for every player")
 }
 
 func parseArgs() {

handlers.go

@@ -18,8 +18,9 @@ const (
 )
 
 var (
-	corsHeader string
-	password   string
+	corsHeader  string
+	password    string
+	reuseTokens bool
 )
 
 func boardHandler(w http.ResponseWriter, r *http.Request) {
@@ -214,7 +215,14 @@ func newKeyHandler(w http.ResponseWriter, r *http.Request) {
 		errorResponse(400, "Unable to convert request to JSON: "+jsonErr.Error(), w, r)
 		return
 	}
-	key, sqlErr := newKeySql(newKey.PlayerID)
+	var key *Key
+	var sqlErr error
+	if reuseTokens {
+		key, sqlErr = keyByPlayer(newKey.PlayerID)
+	}
+	if (sqlErr != nil && reuseTokens) || !reuseTokens {
+		key, sqlErr = newKeySql(newKey.PlayerID)
+	}
 	if sqlErr != nil {
 		fmt.Println(sqlErr)
 		errorResponse(500, "Key could not be created: "+sqlErr.Error(), w, r)