NPM Issue when attempting to published 4.0.0

[stefanpenner]

stefanpenner@Stefans-MacBook-Air ~/s/e/ember-inflector (master)> npm publish
npm notice 
npm notice 📦  ember-inflector@4.0.0
npm notice === Tarball Contents === 
npm notice 1.8kB CHANGELOG.md                    
npm notice 1.1kB LICENSE.md                      
npm notice 2.4kB README.md                       
npm notice 2.0kB .github/workflows/ci.yml        
npm notice 171B  addon/index.js                  
npm notice 747B  addon/lib/helpers/pluralize.js  
npm notice 498B  addon/lib/helpers/singularize.js
npm notice 170B  addon/lib/system.js             
npm notice 1.9kB addon/lib/system/inflections.js 
npm notice 7.5kB addon/lib/system/inflector.js   
npm notice 237B  addon/lib/system/string.js      
npm notice 337B  addon/lib/utils/make-helper.js  
npm notice 89B   app/helpers/pluralize.js        
npm notice 95B   app/helpers/singularize.js      
npm notice 90B   config/environment.js           
npm notice 708B  index.d.ts                      
npm notice 71B   index.js                        
npm notice 2.1kB package.json                    
npm notice === Tarball Details === 
npm notice name:          ember-inflector                         
npm notice version:       4.0.0                                   
npm notice filename:      ember-inflector-4.0.0.tgz               
npm notice package size:  7.4 kB                                  
npm notice unpacked size: 22.0 kB                                 
npm notice shasum:        59965955ab0f6042ee0adf48bff278bc86247028
npm notice integrity:     sha512-3QHvUPjSN1VCy[...]YqLXtanvapz6A==
npm notice total files:   18                                      
npm notice 
npm ERR! code E404
npm ERR! 404 Not Found - PUT https://registry.npmjs.org/ember-inflector - Not found
npm ERR! 404 
npm ERR! 404  'ember-inflector@4.0.0' is not in the npm registry.
npm ERR! 404 You should bug the author to publish it (or use the name yourself!)
npm ERR! 404 
npm ERR! 404 Note that you can also install from a
npm ERR! 404 tarball, folder, http url, or git url.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/stefanpenner/.npm/_logs/2020-12-03T21_07_15_187Z-debug.log

May be an NPM issue, will investigate later.

[sandstrom]

@stefanpenner You've probably tried already, but it may work if you do npm login before npm publish.

I read about someone having that issue:
npm/cli#1637 (comment)

[locks]

According to tweets this was the problem. Closing!

[sandstrom]

thanks @locks