Get-Base64EncodedString.ps1

# Encode string to base64
# =======================


$u="username"
$p="password"

$b64 = [System.Convert]::ToBase64String([System.Text.Encoding]::UTF8.GetBytes($u+":"+$p))

# E.g. For use in Authorization Headers

#$headers = @{"Authorization"="Basic $b64";
#             "Content-Type"="application/json";
#             "charset"="UTF-8"}

#Invoke-RestMethod -Method GET -Uri http://localhost:15672/api/nodes -Headers $headers