How to auto import on save?

This doesn't work:

{
"deno.enable": true,
"deno.lint": true,
"deno.unstable": true,
"editor.defaultFormatter": "denoland.vscode-deno",
"deno.import_intellisense_origins": {
"https://deno.land": true
},
"editor.formatOnSave": true,
"editor.codeActionsOnSave": {
"source.addMissingImports": true,
"source.organizeImports": true,
"source.fixAll": true
}
}