feat: Implement getNextLevel and getTopTenLearners

frontend/src/models/learner.ts

@@ -3,3 +3,5 @@ export interface ILearner {
     level: number;
     score: number;
 }
+
+export type TopTen = ILearner & { nr: number };

frontend/src/models/user.ts

@@ -3,6 +3,7 @@ export interface IUser {
     uid: string;
     showWelcome: boolean;
     score: number;
+    classId: string;
 
     sessionToken: string;
 };