Hi. I'm trying to compile this code
[https://github.com/dom96/nim-in-action-code/blob/fd4bdb5320b42d0c0b47626aab062926b2a71916/Chapter7/Tweeter/src/database.nim#L82](https://github.com/dom96/nim-in-action-code/blob/fd4bdb5320b42d0c0b47626aab062926b2a71916/Chapter7/Tweeter/src/database.nim#L82),
but it returns an error:
Error: type mismatch: got <int> but expected one of:
proc `<`(x, y: int): bool
first type mismatch at position: 2 missing parameter: y
proc `<`(x, y: int64): bool
first type mismatch at position: 2 missing parameter: y
expression: <len(usernames)
Any idea what might be wrong?
