message: use createIndexes
diff: @@ -70,7 +70,7 @@ export class FixtureLoader {
  }
  await mongoose.connection.dropDatabase();
  - await User.ensureIndexes();
  + await User.createIndexes();
  const userfixtures = fs.readdirSync(this.usersDirectory);
  const coursefixtures = fs.readdirSync(this.coursesDirectory);
  