Here we are sometimes you have to change a password using you database it can be more friendly to use phpMyAdmin for security purpose we prefer to use Sequel pro.
The easiest way to change you user password in the database is this one, you will just have to click on the query tab in your Sequel pro app, then past the following code:
/**
* https://nimblo.net/code-snippets/
*/
UPDATE wp_users
SET user_pass= MD5('password')
WHERE ID = 1