Authkey is now stored in .config file to allow automatic logging in

src/main/java/eu/crushedpixel/replaymod/online/authentication/AuthenticationHandler.java

@@ -4,6 +4,7 @@ import eu.crushedpixel.replaymod.ReplayMod;
 import eu.crushedpixel.replaymod.api.client.ApiClient;
 import eu.crushedpixel.replaymod.api.client.ApiException;
 import eu.crushedpixel.replaymod.api.client.holders.AuthKey;
+import net.minecraftforge.common.config.Property;
 
 import java.io.IOException;
 
@@ -32,12 +33,33 @@ public class AuthenticationHandler {
     public static void register(String username, String mail, String password) throws IOException, ApiException {
         AuthKey auth = apiClient.register(username, mail, password);
         authkey = auth.getAuthkey();
+        saveAuthkey(authkey);
     }
 
+    public static boolean loadAuthkeyFromConfig() {
+        Property p = ReplayMod.instance.config.get("authkey", "authkey", "null");
+
+        String key = null;
+        if(!(p.getString().equals("null"))) {
+            key = p.getString();
+        }
+
+        if(key != null) {
+            boolean succ = apiClient.checkAuthkey(key);
+            if(succ) {
+                authkey = key;
+            } else {
+                saveAuthkey("null");
+            }
+            return succ;
+        }
+        return false;
+    }
 
     public static int authenticate(String username, String password) {
         try {
             authkey = ReplayMod.apiClient.getLogin(username, password).getAuthkey();
+            saveAuthkey(authkey);
             return SUCCESS;
         } catch(ApiException e) {
             return INVALID;
@@ -50,6 +72,7 @@ public class AuthenticationHandler {
         try {
             ReplayMod.apiClient.logout(authkey);
             authkey = null;
+            saveAuthkey("null");
             return SUCCESS;
         } catch(ApiException e) {
             return INVALID;
@@ -57,4 +80,10 @@ public class AuthenticationHandler {
             return NO_CONNECTION;
         }
     }
+
+    private static void saveAuthkey(String authkey) {
+        ReplayMod.instance.config.removeCategory(ReplayMod.config.getCategory("authkey"));
+        ReplayMod.instance.config.get("authkey", "authkey", authkey);
+        ReplayMod.instance.config.save();
+    }
 }