[Bug] Handle error message if expired/invalid Github Token is used

[r15ch13]

Bug Report

Current Behavior

If the configured Github Token gh_token is expired or invalid then a unhandled error message is shown

Expected Behavior

Handle message and suggest actions to user

Additional context/output

Installing 'fancontrol' (152) [64bit] from extras bucket
Invoke-RestMethod: X:\~projects\~powershell\scoop\lib\core.ps1:1241:14
Line |
1241 |  …        if ((Invoke-RestMethod -Uri $privateUrl -Headers $headers).Pri …
     |                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     | {"message":"Bad credentials","documentation_url":"https://docs.github.com/rest"}
Starting download with aria2 ...

How to reproduce

scoop config gh_token asdf
scoop install <app>

System details

Windows version: [e.g. 7, 8, 10, 11]

OS architecture: [e.g. 32bit, 64bit, arm64]

PowerShell version: [output of "$($PSVersionTable.PSVersion)"]

Additional software: [(optional) e.g. ConEmu, Git]

Scoop Configuration

{
  "debug": true,
  "gh_token": "asdf",
  "aria2-warning-enabled": false,
  "scoop_branch": "develop",
  "scoop_repo": "https://github.com/ScoopInstaller/Scoop"
}

[maokwen]

Downloading new version
OperationStopped: C:\Users\maokw\scoop\apps\scoop\current\lib\install.ps1:111
Line |
 111 |          throw $e
     |          ~~~~~~~~
     | Response status code does not indicate success: 401 (Unauthorized).

[fvydjt]

This bug is really annoying. I encountered it and it wasted me a lot of time. What's more, I can't even find similar issues by searching the error message. Then I guess the problem may be caused by gh_token so I get here finally. By the way, it seems that the scoop wiki doesn't introduce the config.json.

behavior:
If aria2-enabled is true, it will show:

Invoke-RestMethod : {"message":"Bad credentials","documentation_url":"https://docs.github.com/rest"}
At C:\Users\username\scoop\apps\scoop\current\lib\core.ps1:1158 char:14
+ ...        if ((Invoke-RestMethod -Uri $privateUrl -Headers $headers).Pri ...
+                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (System.Net.HttpWebRequest:HttpWebRequest) [Invoke-RestMethod], WebException
    + FullyQualifiedErrorId : WebCmdletWebResponseException,Microsoft.PowerShell.Commands.InvokeRestMethodCommand

else if aria2-enabled is false, it will show:

The remote server returned an error: (401) Unauthorized.
At C:\Users\username\scoop\apps\scoop\current\lib\install.ps1:111 char:9
+         throw $e
+         ~~~~~~~~
    + CategoryInfo          : OperationStopped: (:) [], WebException
    + FullyQualifiedErrorId : The remote server returned an error: (401) Unauthorized.