what are the differences between wp_users and wp_usermeta tables?

what are the differences between wp_users and wp_usermeta tables?

i use wp-emaillogin plugin and i just noticed that if a user change his email in the profile page it saved in the wp_usermeta table and not in the wp_users table,
this is a problem cause the user have to use the first email to login successful, if he use the new (changed) email he can’t get access.

does anyone here can explain me why and how i can save the user email in the wp_users table?

thanks a lot

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