[BUG] Not usable with private repository with authentication

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🐛 Bug Report:

Describe the bug

I am trying to use the cli using private nexus registry, which requires authentication for connection.
I referenced #130 and tried the connection.

After setting up downloadUrl in the openapitools.json file, the connection returns 401 Unauthorized error.

Steps to Reproduce

Steps to reproduce the behavior:

1. Edit openapitools.json

{
  "$schema": "node_modules/@openapitools/openapi-generator-cli/config.schema.json",
  "spaces": 2,
  "generator-cli": {
    "version": "6.0.1",
    "repository": {
      "downloadUrl": "http://[url-to-private-repo]/${groupId}/${artifactId}/${versionName}/${artifactId}-${versionName}.jar"
    }
  }
}

2. Enter command openapi-generator-cli
3. See error

Expected behavior

Error Message

Download 6.0.1 ... 
Download failed, because of: "Request failed with status code 401" 

Response:
date Wed, 17 Aug 2022 03:52:40 GMT
server Nexus/3.30.1-01 (OSS)
x-content-type-options nosniff
content-security-policy sandbox allow-forms allow-modals allow-popups allow-presentation allow-scripts allow-top-navigation
x-xss-protection 1; mode=block
www-authenticate BASIC realm="Sonatype Nexus Repository Manager"
content-length 0
connection close
content-type application/java-archive
x-content-type-options nosniff
C:\Users\[username]\AppData\Roaming\npm\node_modules\@openapitools\openapi-generator-cli\main.js:679
                error ? reject(new Error(stderr)) : resolve(stdout);
content-security-policy sandbox allow-forms allow-modals allow-popups allow-presentation allow-scripts allow-top-navigation
x-xss-protection 1; mode=block
www-authenticate BASIC realm="Sonatype Nexus Repository Manager"
content-length 0
connection close
                               ^

Error: Error: Unable to access jarfile C:\Users\[username]\AppData\Roaming\npm\node_modules\@openapitools\openapi-generator-cli\versions\6.0.1.jar

    at C:\Users\feliwpy2\AppData\Roaming\npm\node_modules\@openapitools\openapi-generator-cli\main.js:679:32
    at ChildProcess.exithandler (node:child_process:404:5)
    at ChildProcess.emit (node:events:390:28)
    at maybeClose (node:internal/child_process:1064:16)
    at Process.ChildProcess._handle.onexit (node:internal/child_process:301:5)

Operation System (please complete the following information):

• OS: Windows 10

Package System (please complete the following information):

• npm version 8.1.2
• "@openapitools/openapi-generator-cli": "^2.5.1",