<path_to_magento>/bin/magento admin:user:create [--admin-user="..."] [--admin-password="..."] [--admin-email="..."] [--admin-firstname="..."] [--admin-lastname="..."]

1. login to magento 2 admin.
 2. Go to system > All Users.
 3. Select your User
 4. reset password from 'User Info' > 'Account Information'

php magento2/bin admin:user:create --admin-user mys_username --admin-password mypass123 --admin-email my@email.com --admin-firstname john --admin-lastname cage