How to set user id in tag manager code

[suba]

Hi, I am using only matomo tag manager code and i have used

_mtm.push(['setUserId', 'some number']); to set user id and it is not being set. Do anyhave have solution for this?

[Lukas (Lukas Winkler)]

Duplicate of

User id is not being set in tag manager code

I don’t really use Tag Manager, but maybe @RonanChardonneau has an idea. Can you expand on how you “added _mtm.push(['setUserId', 'some number']); in tag manager code”?