Created the ResponderAuthentication to authenticate a specific request

src/main/java/de/gnmyt/autoresponder/authentication/ResponderAuthentication.java

@@ -0,0 +1,30 @@
+package de.gnmyt.autoresponder.authentication;
+
+import com.sun.net.httpserver.BasicAuthenticator;
+
+public class ResponderAuthentication extends BasicAuthenticator {
+
+    private final AuthenticationDetails details;
+
+    /**
+     * Constructor of the {@link ResponderAuthentication}
+     *
+     * @param details Your authentication details from the {@link de.gnmyt.autoresponder.SimpleAutoResponder}
+     */
+    public ResponderAuthentication(AuthenticationDetails details) {
+        super("/");
+        this.details = details;
+    }
+
+    /**
+     * Checks the credentials of the request
+     *
+     * @param username The name of the user from the request
+     * @param password The password of the user from the request
+     * @return <code>true</code> if the provided credentials are correct, otherwise <code>false</code>
+     */
+    @Override
+    public boolean checkCredentials(String username, String password) {
+        return details.getUsername().equals(username) && details.getPassword().equals(password);
+    }
+}