Oauth and Wordpress

Hey guys,

I’m trying to better understand the OAuth and a Two-Legged Authentication. I was thinking about using this wordpress plugin https://wp-oauth.com/ and integrating it with Particle. The question is after the customer account is created in wordpress and in particle (using the plugin) is it possible for the customer to login to my app and use the wordpress password instead of authenticating against the Wordpress server first to obtain the token. Slightly modified version of this flow: