Fix database test data

server/Database.ts

@@ -43,17 +43,17 @@ export class Database {
   }
 
   async insertTestData() {
-    const NUM = 100;
+    const NUM = 50;
     const users: User[] = [];
     for (let i = 0; i < NUM; i++) {
-      const username = "alex" + i % 50;
+      const username = "alex" + i;
       let user = await this.users.findByUsername(username);
-      // if (!user) {
+      if (!user) {
         user = await this.users.create({
           name: "Alex Mikhalev" + i,
           username
         });
-      // }
+      }
       await user.setPassword("kakashka" + i);
       users.push(user);
     }