Reset password for the admin user

For Drupal 7
restore admin password

drush sqlq "select name from users where uid=1"

Once you know the name, you can reset the password as follows:

drush upwd admin --password=pass

For Drupal 8+

drush user:password site-admin "password"

UPDATE ALL USER PASSWORDS TO ADMIN PASSWORD

drush sql-query "UPDATE users_field_data set pass=(SELECT pass FROM users_field_data where uid=1) WHERE uid <>1"

After this need to clear cache:
drush cr

Possible You'll need to do this:
drush sql:query "TRUNCATE TABLE flood;"