Revert "no comments"

This reverts commit d73b7e4b1b498309f379f93f583fe7e28d466c8f.
change form customer to client in some places
phase 2 - working.
orel- 
you need to check why the yellow star of the pr and the client
dissapered.

changes in DB - 
in users:
1. UserType - Client and not Customer
2. timestamp - change the type to bigint