\ban ASCII word boundary
users={the literal text users={ (case sensitive) .*?any character (except for line terminators), repeated any number of times
}the literal } (12510 / 1758 / 7D16)
(*SKIP)acts like (*PRUNE), but the next unanchored match attempt starts where (*SKIP) was reached instead of at the next subject character
(*F)forces the current match attempt to fail at this position