Cannot find module 'mysql'

[blueberrry]

Hey, I have install mysql and can run mysql -v in pwsh.
I've followed the steps and changed the password in database.js.

When I run npm i, an error is thrown stating it cannot find module 'mysql'

`
npm start

[email protected] start C:\projects\coffee-learner\coffee-api
nodemon server.js

[nodemon] 1.19.1
[nodemon] to restart at any time, enter rs
[nodemon] watching: .
[nodemon] starting node server.js
module.js:550
throw err;
^

Error: Cannot find module 'mysql'
at Function.Module._resolveFilename (module.js:548:15)
at Function.Module._load (module.js:475:25)
at Module.require (module.js:597:17)
at require (internal/module.js:11:18)
at Object. (C:\projects\coffee-learner\coffee-api\app\controllers\product.controller.js:1:77)
at Module._compile (module.js:653:30)
at Object.Module._extensions..js (module.js:664:10)
at Module.load (module.js:566:32)
at tryModuleLoad (module.js:506:12)
at Function.Module._load (module.js:498:3)
[nodemon] app crashed - waiting for file changes before starting...
`