How to set environment variables for bash from within powershell

Question

Using powershell how do I set the environment variables (here, particularly "ApiSecret") so that printenv will show the necessary variables?

(Operating on the assumption that the problem is that Visual Studio and bash aren't picking up the environment variables properly. They can be set from bash easily enough.)

I'm on Linux:

thufir@dur:~/powershell/helloPSTwitterAPI$ 
thufir@dur:~/powershell/helloPSTwitterAPI$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 18.10
Release:    18.10
Codename:   cosmic
thufir@dur:~/powershell/helloPSTwitterAPI$ 

powershell code:

Import-Module PSTwitterAPI


Set-TwitterOAuthSettings -ApiKey $env:ApiKey -ApiSecret $env:ApiSecret -AccessToken $env:AccessToken -AccessTokenSecret $env:AccessTokenSecret

#Get-TwitterUsers_Lookup -screen_name 'mkellerman'

$TwitterStatuses = Get-TwitterStatuses_UserTimeline -screen_name 'mkellerman'
#$TwitterStatuses = [array]Get-TwitterStatuses_UserTimeline -screen_name 'mkellerman'

Foreach ($status in $TwitterStatuses) {
   Write-Host $status.text
}



Write-Host "done"

Visual Studio Code:

PS /home/thufir> /home/thufir/powershell/helloPSTwitterAPI/twitter.ps1


WARNING: OAuthSettings with AccessToken '' already exists.
Invoke-RestMethod : {"errors":[{"code":215,"message":"Bad Authentication data."}]}
At /home/thufir/.local/share/powershell/Modules/PSTwitterAPI/0.0.7/public/Invoke-TwitterAPI.ps1:34 char:5
+     Invoke-RestMethod @RestMethod_Params
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          : InvalidOperation: (Method: GET, Reques\u2026PowerShell/6.2.3
}:HttpRequestMessage) [Invoke-RestMethod], HttpResponseException
+ FullyQualifiedErrorId : WebCmdletWebResponseException,Microsoft.PowerShell.Commands.InvokeRestMethodCommand
Invoke-RestMethod : {"errors":[{"code":215,"message":"Bad Authentication data."}]}
At /home/thufir/.local/share/powershell/Modules/PSTwitterAPI/0.0.7/public/Invoke-TwitterAPI.ps1:34 char:5
+     Invoke-RestMethod @RestMethod_Params
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          : InvalidOperation: (Method: GET, Reques\u2026PowerShell/6.2.3
}:HttpRequestMessage) [Invoke-RestMethod], HttpResponseException
+ FullyQualifiedErrorId : WebCmdletWebResponseException,Microsoft.PowerShell.Commands.InvokeRestMethodCommand
done
PS /home/thufir> 

but then neither is the standard bash console:

bash console:

thufir@dur:~/powershell/helloPSTwitterAPI$ 
thufir@dur:~/powershell/helloPSTwitterAPI$ powershell twitter.ps1 
Invoke-RestMethod : {"errors":[{"code":215,"message":"Bad Authentication data."}]}
At /home/thufir/.local/share/powershell/Modules/PSTwitterAPI/0.0.7/public/Invoke-TwitterAPI.ps1:34 char:5
+     Invoke-RestMethod @RestMethod_Params
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          : InvalidOperation: (Method: GET, Reques\u2026PowerShell/6.2.3
}:HttpRequestMessage) [Invoke-RestMethod], HttpResponseException
+ FullyQualifiedErrorId : WebCmdletWebResponseException,Microsoft.PowerShell.Commands.InvokeRestMethodCommand
Invoke-RestMethod : {"errors":[{"code":215,"message":"Bad Authentication data."}]}
At /home/thufir/.local/share/powershell/Modules/PSTwitterAPI/0.0.7/public/Invoke-TwitterAPI.ps1:34 char:5
+     Invoke-RestMethod @RestMethod_Params
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          : InvalidOperation: (Method: GET, Reques\u2026PowerShell/6.2.3
}:HttpRequestMessage) [Invoke-RestMethod], HttpResponseException
+ FullyQualifiedErrorId : WebCmdletWebResponseException,Microsoft.PowerShell.Commands.InvokeRestMethodCommand
done
thufir@dur:~/powershell/helloPSTwitterAPI$ 

bash console, but within powershell:

PS /home/thufir/powershell/helloPSTwitterAPI> 
PS /home/thufir/powershell/helloPSTwitterAPI> ./twitter.ps1
WARNING: OAuthSettings with AccessToken '17639841-ZltXv9qW0zlW60WNy2MtcAZ0FEljMqExQQ8voyy1p' already exists.
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http://localhost:3000
done
PS /home/thufir/powershell/helloPSTwitterAPI> 

(From bash, printenv doesn't show the API keys which the script depends upon.)

Version: 1.41.1 Commit: 26076a4de974ead31f97692a0d32f90d735645c0 Date: 2019-12-18T15:04:31.999Z Electron: 6.1.5 Chrome: 76.0.3809.146 Node.js: 12.4.0 V8: 7.6.303.31-electron.0 OS: Linux x64 4.18.0-25-generic snap