Need suggestion for taggin on commnet (mass tag)

I have a list of user names I want to tag, around 50k, I am looking for a way to do it.
Tag them all on same post.
Dont really know much about it and will be happy to hear.
Not willing to use my account to tag it but something more similar to SMM that will use bot users and tag my list on a spesific post.

Can anyone help with that?