* Check for migrated username * Add e2e for reserved username due to migration * Add username change test * Update username.ts * fixed type checks * Refactor to use isOrganization * Typing * Typing * Removed the isOrganization function --------- Co-authored-by: Joe Au-Yeung <65426560+joeauyeung@users.noreply.github.com> Co-authored-by: Keith Williams <keithwillcode@gmail.com>