Create API for registering user on wordpress site with 3rd party site

Newer Versions of WordPress include a pretty complete REST API.
You can use the REST API Handbook to find information how to use it.

You can find information about how to create a user on this page: Creating A User

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)