I am writing a plugin that fetches some extended user info from a remote service and I need it to execute its function each time a user logs in.
Is there a hook that gets fired after login that I can add an action to?
The action hook wp_login runs when the user logs in - it can run a simple function.
documentation : https://codex.wordpress.org/Plugin_API/Action_Reference/wp_login
The real breadwinner here is
and to change the redirect URL after login, there is the filter
I would caution against using
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