Use Guava cache for caching PlayerAuth object.

src/main/java/fr/xephi/authme/cache/auth/PlayerAuth.java

@@ -194,7 +194,7 @@ public class PlayerAuth {
         this.setHash(auth.getHash());
         this.setIp(auth.getIp());
         this.setLastLogin(auth.getLastLogin());
-        this.setName(auth.getNickname());
+        this.setNickname(auth.getNickname());
         this.setQuitLocX(auth.getQuitLocX());
         this.setQuitLocY(auth.getQuitLocY());
         this.setQuitLocZ(auth.getQuitLocZ());
@@ -204,11 +204,11 @@ public class PlayerAuth {
     }
 
     /**
-     * Method setName.
+     * Method setNickname.
      *
      * @param nickname String
      */
-    public void setName(String nickname) {
+    public void setNickname(String nickname) {
         this.nickname = nickname.toLowerCase();
     }
 
@@ -522,7 +522,7 @@ public class PlayerAuth {
 
         public PlayerAuth build() {
             return new PlayerAuth(
-                checkNotNull(name).toLowerCase(),
+                checkNotNull(name),
                 nullToEmpty(hash),
                 nullToEmpty(salt),
                 groupId,

src/main/java/fr/xephi/authme/cache/auth/PlayerCache.java

@@ -40,8 +40,7 @@ public class PlayerCache {
      * @param auth PlayerAuth
      */
     public void updatePlayer(PlayerAuth auth) {
-        cache.remove(auth.getNickname().toLowerCase());
-        cache.put(auth.getNickname().toLowerCase(), auth);
+        cache.put(auth.getNickname(), auth);
     }
 
     /**
@@ -87,7 +86,7 @@ public class PlayerCache {
     /**
      * Method getCache.
      *
-     * @return ConcurrentHashMap<String,PlayerAuth>
+     * @return ConcurrentHashMap
      */
     public ConcurrentHashMap<String, PlayerAuth> getCache() {
         return this.cache;