separate list of parameter into different file in Powershell - powershell

Question

I have a powershell script with 2 funtions:
function Stonebrach.Connect {
param(
[Parameter(Mandatory=$true)]
$Sb_uri,
[Parameter(Mandatory=$true)]
$Auth_filename,
[Parameter(Mandatory=$true)]
$Method,
[Parameter(Mandatory=$false)]
$Body
)
$basicAuth=Get-Content "C:\$auth_filename"
$headers = #{
"Authorization" = $basicAuth
"Content-Type"="application/json"
}
$RSP=$null
try{
if ( $body -eq $null ) {
$response = invoke-restmethod -Uri $Sb_uri -Method $Method -Headers $headers
}
else {
$response = invoke-restmethod -Uri $sb_uri -Method $method -Headers $headers -Body $body
}
return $response
}
catch{
$RSP = $_.Exception.Message
return $RSP
}
}
function Stonebranch.Create.Task.Windows {
param(
[Parameter(Mandatory=$true)]
$Sb_base_uri,
[Parameter(Mandatory=$true)]
$Auth_filename,
[Parameter(Mandatory=$true)]
$Method,
[Parameter(Mandatory=$true)]
$Body
)
Stonebrach.Connect -SB_uri $Sb_base_uri/task -Auth_filename $Auth_filename -Method $Method -Body $Body
}
the body param is hardcoded as below:
$body = '
{
"type" : "taskWindows",
"actions" : {
"abortActions" : [],
"emailNotifications" : [],
"setVariableActions" : [],
"snmpNotifications" : [],
"systemOperations" : []
},
"agent" : "test",
"name" : "Test Create",
"summary" : "Test Create"
}
'
Call the function:
$response = Stonebranch.Create.Task.Windows -Sb_base_uri $Sb_base_uri -Auth_filename $Auth_filename -Method POST -Body $body
Here's the question: i want to separate the $body into a different file (prefer YAML file). Anyone know how to separate and pass the list of param to the script so i can use them? I find it hard to pass the list of param and call the function.
Please help me, thanks.