fix: bugs with author and user id in postController

[0lia]

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[handicraftsman]

Approving, but do an extra check that every call to findPostsByAuthorIdAndDirections is checked, or rename the method to specify what ID you need (and that will do the check for you, by breaking the pipeline)

[handicraftsman]

It's a good idea to rename the method, to make sure you don't accidentally skip some calls where id type got changed.

[handicraftsman]

By the way, while this is not applicable to your current design, some apps (especially based on domain-driven-development idioms, which you might see someday) declare dedicated classes for ID types, that allows type-checking the IDs you are passing to your methods.