A third party logs in to vk (js sdk) to obtain a user's mailbox account

php website connects with third-party login vk (Russian social software, how does qq), get a user"s email account?
official document is relatively simple, did not read clearly, but also please tell the big god, brother in some thanks!

Third-party-login-to php
Sep.26,2021

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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-64f5-1b30f6c-2bd3c.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b30f6c-2bd3c.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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