Through WP CLI
WP CLI is a command line tool for managing your WordPress installation.
1. Move into the /wordpress directory and type
$ wp user list
to see all users. Find the ID of the user you’d like to update.
2. Then, update the user
$ wp user update 1 --user_pass=$UP3RstrongP4$$w0rd
replacing “1” with the id of the user you want to update.