Prompt for 'Could not create user'' in npm login

npm login prompts for "Could not create user""
npm adduser also shows the same hint

Username: lgnms
Password:
Email: (this IS public) 792841450@qq.com
npm ERR! 301 Could not create user
npm ERR! undefined

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\\AppData\Roaming\npm-cache\_logs\2018-05-30T02_33_11_124Z-debug.log

A lot of methods have been found on the Internet, such as deleting .npmrc, and this problem will still occur after trying.

Npm
Mar.20,2021

try using https://registry.npmjs.org/ address, do not use the address of http http://registry.npmjs.org/

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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-64f5-49bc263-113cb.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-49bc263-113cb.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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