How does wordpress call a field information in the database?

how does wordpress call a field information in the database?
I want to call the meta_ value in the wp_usermeta table in the wp database. How to call the information in the red box in the picture with PHP?
is the name of the calling avatar. The default is the following code. How to modify it?

<?php echo get_avatar( $current_user->ID, "24" , get_edit_profile_url($current_user->ID) ); ?>

Sep.16,2021

got it done by myself

<?php echo get_user_meta(get_current_user_id($user),'um_customize_avatar',true); ?>
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3348d-4d51e.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3348d-4d51e.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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