update Readme and Handle TypeError

[gabru-md]

• update readme.md with the latest parameters for the parameters, i.e. including the number of results to be searched for.
• Handling TypeError for the same , whenever a 500 request is sent from the server.

I would like to work on this issue.
Thanks :D

[gabru-md]

A pull request has been issued for the same. Meanwhile I'm ticking the check-boxes as these are covered in the Pull Request.