code: func (o *InvitationManager) FilterByPhonenumber(phonenumber string, status string) ([]JoinOrganizationInvitation, error) {
  	orgRequests := []JoinOrganizationInvitation{}
  	if status == "" {
  		return o.GetByPhonenumber(phonenumber)
  	}
  	qry := bson.M{
  		"phonenumber": phonenumber,
  		"status":      status,
  	}
  	err := o.collection.Find(qry).All(&orgRequests)
  	return orgRequests, err
  }
docs: // FilterByPhonenumber gets all invitations for a phone number, filtered on status