message: Fix merge conflict markers
diff: @@ -26,13 +26,8 @@ const courseSchema = new mongoose.Schema({
  ],
  students: [
  {
  -<<<<<<< HEAD
  - type: String,
  - ref: User
  -=======
  type: mongoose.Schema.Types.ObjectId,
  ref: 'User'
  ->>>>>>> origin/develop
  }
  ],
  lectures: [
  