Adding Capabilities to a WordPress User Account

No there isn’t anything built into the core WordPress, I would recommend this plugin:
https://wordpress.org/plugins/user-roles-and-capabilities/screenshots/

Or you would use PHP to add a capability to a specific role (or user):
https://codex.wordpress.org/Function_Reference/add_cap

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