Fixes autoJoiningToQuizGroup algorithm

src/db/MemberDAO.ts

@@ -97,7 +97,7 @@ class MemberDAO extends AbstractDAO<Array<MemberEntity>> {
     DbDAO.deleteMany(DbCollection.Members, { currentQuizName: removedQuiz.name });
   }
 
-  public getMembersByQuizGroup(name: string): object {
+  public getMemberAmountPerQuizGroup(name: string): object {
     const result = {};
 
     this.getMembersOfQuiz(name).forEach(member => {

src/routers/rest/QuizRouter.ts

@@ -699,7 +699,8 @@ export class QuizRouter extends AbstractRouter {
 
     let groupName = 'Default';
     if (activeQuiz.sessionConfig.nicks.memberGroups.length > 1) {
-      groupName = Object.values(MemberDAO.getMembersByQuizGroup(activeQuiz.name)).sort()[0];
+      const memberGroupLoad = MemberDAO.getMemberAmountPerQuizGroup(activeQuiz.name);
+      groupName = Object.entries(memberGroupLoad).sort((a, b) => a[1] - b[1])[0][0];
     }
 
     return {