Update db to incorporate Auth0

[zakaf]

Currently client <-> client_crawl_ct <-> crawl_url is the basic structure of the db. But since client registration is done with Auth0, client table is unnecessary. Client table should be deleted and clinet_crawl_ct should have user_id(Auth0) to connect to crawl

[zakaf]

client table is now dropped and client_crawl_ct's client_id column is varchar(100) to incorporate auth0 id