Use "and" instead of &, unless part of a proper noun or a common abbreviation. For example: Notices and slips, not Notices & slips; Baker & Taylor, R&D.
login
Base terminology
(noun) Use "login" when referring to the details or credentials (such as a username and password) used to log in to a system like Koha.
patron
Base terminology
Use "patron", not "user", "member", or "borrower".