Store credentials in a file and use them later

Sometimes a script have to authenticate, but it would be a really bad idea to store passwords in scripts. Encrypt them!

Store-Creds.ps1

<#
.SYNOPSIS
    Store-Creds - Stores a password encrypted to disk.
.DESCRIPTION
    Store-Creds - Stores a password encrypted to disk
    Allows to create a file in the current directory and store the password encrypted in it.
.NOTES
    File Name  : Store-Creds.ps1 
    Author     : Fabrice ZERROUKI - fabricezerrouki@hotmail.com
#>
$ValidPattern = "^[a-zA-Z0-9\s]+$"
$UserName=Read-Host "Please provide a username"
if ($UserName -match $ValidPattern) {
$CredsPath=".\$UserName-Creds.txt"
}
else
{
$UserName=$UserName -replace "\\","_"
$CredsPath=".\$UserName-Creds.txt"
}

if (!(Test-Path $CredsPath)) {
$Password=Read-Host "The file '$CredsPath' will be created with your encrypted password. Enter your password" -AsSecureString | ConvertFrom-SecureString | Set-Content $credsPath
Write-Host "File '$CredsPath' created! You can now use it with the 'Get-Creds.ps1' script." -ForegroundColor DarkGreen;
} else {Write-Host "The file '$CredsPath' already exists." -ForegroundColor Yellow;}

Get-Creds.ps1

<#
.SYNOPSIS
    Get-Creds - Gets an encrypted password from file.
.DESCRIPTION
    Get-Creds - Gets an encrypted password from file
    Allows to read an encrypted password stored in a file in the current directory.
.PARAMETER UserName
    Defines the username associated to the password
    Mandatory parameter.
.NOTES
    File Name  : Get-Creds.ps1 
    Author     : Fabrice ZERROUKI - fabricezerrouki@hotmail.com
#>
Param(
[Parameter(Mandatory=$true, HelpMessage="You must provide an username.")]
$UserName
)
$ValidPattern = "^[a-zA-Z0-9\s]+$"
if ($UserName -match $ValidPattern) {
$CredsPath=".\$UserName-Creds.txt"
}
else
{
$UserName=$UserName -replace "\\","_"
$CredsPath=".\$UserName-Creds.txt"
}

if (Test-Path $CredsPath) {
$Password=Get-Content $CredsPath | ConvertTo-SecureString
Write-Host "Password stored in '$CredsPath' file is '$Password'." -ForegroundColor DarkGreen;
} else {Write-Host "The file '$CredsPath' doesn't exists. You can create it with the 'Store-Creds.ps1' script." -ForegroundColor Yellow;}