In the API reference documentation there are two terms : _id & uid .
What is the use case of each of them and what the difference between them
Hi @mkassir95. Would you mind linking the according documentation pages?
uid is in Optional User Info Section and _id is in Recommended paramters Section
uid should normally overwrite the
_id, based on your config setting of
enable_userid_overwrites_visitorid. While the
_id is hexadecimal the
uid can be filled with more custom content (like a username or alias).
If you need more help with that, maybe try asking your questions on our forum (https://forum.matomo.org). We are actually only handling bug reports and feature requests here.