[Added] Tests and some more functionality to the Services

backend/src/main/java/com/ninjaws/quiz/models/Request.java

@@ -0,0 +1,14 @@
+package com.ninjaws.quiz.models;
+
+import lombok.Getter;
+
+@Getter
+public class Request {
+    private final String sessionId;
+    private final QuizSettings quizSettings;
+
+    public Request(String sessionId, QuizSettings quizSettings) {
+        this.sessionId = sessionId;
+        this.quizSettings = quizSettings;
+    }
+}