Retrieves a post with the provided slug.
The slug is the end of a post's URL that refers to a specific post.
For example, if a post's URL is https:/example.com/blog/post/my-post-slug,
the slug is my-post-slug. The slug is case-sensitive, and is generally derived from the post title,
unless specified otherwise.
Responses from this method are cached for optimal performance.
This method doesn't return any custom errors, but may return standard errors. Learn more about standard Wix errors.