code: func InitModels() {
  	index := mgo.Index{
  		Key:      []string{"username"},
  		Unique:   true,
  		DropDups: true,
  	}
  	db.EnsureIndex(mongoCollectionName, index)
  
  	index = mgo.Index{
  		Key:      []string{"username", "token"},
  		Unique:   true,
  		DropDups: true,
  	}
  	db.EnsureIndex(mongoCollectionNameResetToken, index)
  
  	automaticExpiration := mgo.Index{
  		Key:         []string{"createdat"},
  		ExpireAfter: time.Minute * 10,
  		Background:  true,
  	}
  	db.EnsureIndex(mongoCollectionNameResetToken, automaticExpiration)
  }
docs: //InitModels initializes models in mongo, if required.