When you run Get-Credential or are otherwise prompted for a username and password, Windows PowerShell (powershell.exe) always opens a separate credentials dialog. The new PowerShell 7 (pwsh.exe) prompts inside the console:
PS> Get-Credential PowerShell credential request Enter your credentials. User: Tobias Password for user Tobias: ****** UserName Password -------- -------- Tobias System.Security.SecureString
If you like the console prompt better than opening separate dialogs, you can switch the default behavior for Windows PowerShell. You do need Administrator privileges though to change the registry setting:
$key = "HKLM:\SOFTWARE\Microsoft\PowerShell\1\ShellIds" Set-ItemProperty -Path $key -Name ConsolePrompting -Value $true
To restore the default behavior, either change the value to $false, or remove the registry value via Remove-ItemProperty.