When rights management uses mixin, how to reassign the global value in mixin

how do I reassign vue.$user.element?

there is something wrong with my writing. There has been no output of value

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Mixin vuex vue.js
Mar.04,2021

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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-64f5-1b328ff-341ee.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b328ff-341ee.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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