How to get google fcm http v1 interface, access_token? in header

as mentioned in the question, overseas push now adopts google system push, and fcm replaces the original interface of gcm. How to obtain the access_token in the interface

Push-notification google
Mar.12,2021

excuse me, how did you solve it? now I have this problem too

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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-64f5-1e44add-650ec.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e44add-650ec.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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