membership plugin

There aren’t any plugins called “WP membership.”

Do you mean https://wordpress.org/plugins/wp-members ? If so, I recommend asking at https://wordpress.org/support/plugin/wp-members#postform so the plugin’s developers and support community can help you with this.

Alternatively, if you meant https://wordpress.org/plugins/membership , I recommend asking at https://wordpress.org/support/plugin/membership#postform so the plugin’s developers and support community can help you with this.