Sending the required plugins to my developer

Kindly let me know if I can send my user name and password to my developer (if this will not give him access to my personal and payment data), so that to make things easier for me because sending the plugins to him by email is not an easy job and time consuming process. Too much folders if I have to transfer the downloaded files!

If there is any other method to share my plugins with him, please let me know.

Thanks in advance,
Mohd