removed screen_name from statuses API call

generates 404s for people who have changed it
use utf8mb4 for MovesPlace's name column

see https://app.asana.com/0/790107150363/15662593247635
Request the userRegistrationDate at each incremental update

The userRegistrationDate apparently gets reset which causes date bounds errors when using the original one

see https://app.asana.com/0/790107150363/15687948091041