Fix: for duplicate education entries

[syed0596]

Hi, thanks for the great library!

I noticed that when scraping a profile, the get_educations() method was adding the same education entry multiple times to the final list. This seems to be caused by the scraper matching multiple HTML elements for a single entry on the education details page.

Solution:
This pull request fixes the issue by:

1. Initializing a scraped_education_keys set in the Person class.
2. In get_educations(), it creates a unique key for each scraped entry.
3. It only adds the new Education object if its key hasn't been seen before.

This ensures that each education is only recorded once. I also restored the scrape_logged_in method which appeared to have been accidentally deleted in the version I had.

Thanks for your consideration!