Compile the project with Java 7. Many hosters don't have Java 8 yet.

src/main/java/com/github/games647/fastlogin/hooks/AuthMeHook.java

@@ -7,7 +7,7 @@ import org.bukkit.entity.Player;
 
 /**
  * Github: https://github.com/Xephi/AuthMeReloaded/
- * Project page: dev.bukkit.org/bukkit-plugins/authme-reloaded/
+ * Project page: http://dev.bukkit.org/bukkit-plugins/authme-reloaded/
  */
 public class AuthMeHook implements AuthPlugin {
 

src/main/java/com/github/games647/fastlogin/hooks/LoginSecurityHook.java

@@ -8,7 +8,8 @@ import org.bukkit.entity.Player;
  * Github: http://dev.bukkit.org/bukkit-plugins/loginsecurity/
  * Project page: https://github.com/lenis0012/LoginSecurity-2
  *
- * on join: https://github.com/lenis0012/LoginSecurity-2/blob/master/src/main/java/com/lenis0012/bukkit/ls/LoginSecurity.java#L282
+ * on join:
+ * https://github.com/lenis0012/LoginSecurity-2/blob/master/src/main/java/com/lenis0012/bukkit/ls/LoginSecurity.java#L282
  */
 public class LoginSecurityHook implements AuthPlugin {
 

src/main/java/com/github/games647/fastlogin/listener/PlayerListener.java

@@ -32,10 +32,19 @@ public class PlayerListener implements Listener {
         //check if it's the same player as we checked before
         if (session != null && session.getUsername().equals(player.getName())
                 && session.isVerified()) {
-            Bukkit.getScheduler().runTaskLater(plugin, () -> {
-                if (player.isOnline()) {
-                    plugin.getLogger().log(Level.FINER, "Logging player {0} in", player.getName());
-                    authPlugin.forceLogin(player);
+//            Bukkit.getScheduler().runTaskLater(plugin, () -> {
+//                if (player.isOnline()) {
+//                    plugin.getLogger().log(Level.FINER, "Logging player {0} in", player.getName());
+//                    authPlugin.forceLogin(player);
+//                }
+            Bukkit.getScheduler().runTaskLater(plugin, new Runnable() {
+
+                @Override
+                public void run() {
+                    if (player.isOnline()) {
+                        plugin.getLogger().log(Level.FINE, "Logging player {0} in", player.getName());
+                        authPlugin.forceLogin(player);
+                    }
                 }
                 //Wait before auth plugin initializes the player
             }, 1 * 20L);

src/main/java/com/github/games647/fastlogin/listener/StartPacketListener.java

@@ -29,6 +29,7 @@ public class StartPacketListener extends PacketAdapter {
 
     //only premium (paid account) users have a uuid from there
     private static final String UUID_LINK = "https://api.mojang.com/users/profiles/minecraft/";
+    //this includes a-zA-Z1-9_
     private static final String VALID_PLAYERNAME = "^\\w{2,16}$";
 
     private final ProtocolManager protocolManager;

src/main/resources/plugin.yml

@@ -23,6 +23,7 @@ commands:
         description: 'Marks the invoker or the player specified as premium'
         aliases: [prem, fastlogin, loginfast]
         usage: /<command> [player]
+        permission: ${project.artifactId}.command.premium
 
 permissions:
     ${project.artifactId}.command.premium: