func LookupInUser(field userField, value interface{}, n int) ([]*User, error) {
	iEntries, err := lookUp(&User{}, field, value, n)
	if err != nil {
		return nil, err
	}

	// == Convert to type user
	valueSlice := reflect.ValueOf(iEntries)
	entries := make([]*User, valueSlice.Len())

	for i := 0; i < valueSlice.Len(); i++ {
		entries[i] = valueSlice.Index(i).Interface().(*User)
	}

	return entries, err
}
func LookupInUser(field userField, value interface{}, n int) ([]*User, error) {
	iEntries, err := lookUp(&User{}, field, value, n)
	if err != nil {
		return nil, err
	}

	// == Convert to type user
	valueSlice := reflect.ValueOf(iEntries)
	entries := make([]*User, valueSlice.Len())

	for i := 0; i < valueSlice.Len(); i++ {
		entries[i] = valueSlice.Index(i).Interface().(*User)
	}

	return entries, err
}
// LookupInUser looks up an user by the given values.
//
// The count determines the number of fields to return:
//   n > 0: at most n fields
//   n == 0: the result is nil (zero fields)
//   n < 0: all fields