internal/functions/Get-Token.ps1
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function Get-Token { <# .SYNOPSIS Returns the token to use for authentication to MSGraph. .DESCRIPTION Returns the token to use for authentication to MSGraph. Automatically refreshes it if it is close to expiration. .EXAMPLE PS C:\> Get-Token Returns the token to use for authentication to MSGraph. #> [CmdletBinding()] Param ( ) process { if ($script:msgraphToken -and $script:msgraphToken.ExpiresOn.LocalDateTime -gt (Get-Date).AddMinutes(3)) { return $script:msgraphToken } $parameters = @{ TenantId = $script:tenantID ClientId = $script:clientID ErrorAction = 'Stop' } if ($script:clientCertificate) { $parameters.ClientCertificate = $script:clientCertificate } else { $parameters.RedirectUri = $script:redirectUri $parameters.LoginHint = $script:msgraphToken.Account.Username $parameters.Silent = $true } try { $token = Get-MsalToken @parameters } catch { Write-Warning "Failed to re-authenticate to tenant $script:tenantID : $_" throw } $script:msgraphToken = $token return $token } } |