Grant read access to my SQL Server database to all future SQL users Can I configure my SQL Server 2014 database so that any login that will be created in the future will have read access to it automatically?
To add on my comment, you can create a trigger on a database level and add user to desired role automatically when you create a user. You can add a custom one, but for example sake i added db_datareader.

Example :

    create trigger tg_AddUserToRole on database after CREATE_USER
    as
    declare @LoginName nvarchar(30)
    set @LoginName =  (select EVENTDATA().value('(EVENT_INSTANCE/ObjectName)[1]','nvarchar(30)'))
    IF EXISTS(select 1 from sys.sysusers where name = @LoginName and  issqluser = 1)
    exec sp_addrolemember 'db_datareader', @LoginName