Minor changes

src/main/java/org/samo_lego/simpleauth/mixin/MixinPlayerEntity.java

@@ -113,7 +113,13 @@ public abstract class MixinPlayerEntity implements PlayerAuth {
 
         if(!playerCacheMap.containsKey(this.getFakeUuid())) {
             // First join
-            playerCache = PlayerCache.fromJson(player, DB.getUserData(this.getFakeUuid()));
+            String jsonString =  DB.getUserData(this.getFakeUuid());
+            if(jsonString != null && !jsonString.isEmpty())
+                playerCache = PlayerCache.fromJson(player, jsonString);
+            else
+                playerCache = new PlayerCache(player);
+
+            // Saving to hashmap of player caches
             playerCacheMap.put(this.getFakeUuid(), playerCache);
         }
         else {

src/main/java/org/samo_lego/simpleauth/storage/PlayerCache.java

@@ -65,6 +65,11 @@ public class PlayerCache {
 
     private static final Gson gson = new Gson();
 
+    /**
+     * Creates an empty cache for player (when player doesn't exist in DB).
+     *
+     * @param player player to create cache for
+     */
     public PlayerCache(ServerPlayerEntity player) {
         if(config.experimental.debugMode)
             logInfo("Creating cache for " + Objects.requireNonNull(player).getName());
@@ -100,10 +105,6 @@ public class PlayerCache {
     }
 
     public static PlayerCache fromJson(ServerPlayerEntity player, String json) {
-        if(json.isEmpty()) {
-            // Player doesn't have data yet
-            return new PlayerCache(player);
-        }
         if(config.experimental.debugMode)
             logInfo("Creating cache for " + Objects.requireNonNull(player).getName());
 
@@ -111,6 +112,8 @@ public class PlayerCache {
         PlayerCache playerCache = gson.fromJson(json, PlayerCache.class);
 
         playerCache.loginTries = 0;
+        playerCache.isAuthenticated = false;
+
         if(playerCache.password != null && !playerCache.password.isEmpty()) {
             playerCache.isRegistered = true;
         }