add server pinger

src/main/java/cc/fascinated/model/mojang/MojangUsernameToUuid.java

@@ -1,27 +0,0 @@
-package cc.fascinated.model.mojang;
-
-import lombok.Getter;
-import lombok.NoArgsConstructor;
-
-@Getter @NoArgsConstructor
-public class MojangUsernameToUuid {
-
-    /**
-     * The UUID of the player.
-     */
-    private String id;
-
-    /**
-     * The name of the player.
-     */
-    private String name;
-
-    /**
-     * Check if the profile is valid.
-     *
-     * @return if the profile is valid
-     */
-    public boolean isValid() {
-        return id != null && name != null;
-    }
-}