[CmdletBinding()]
Param(
    [Parameter()]
    [string]$VaultAPIAddress,
    [Parameter()]
    [string]$VaultToken,
    [Parameter()]
    [string]$VaultPwPolicy,
    [Parameter(Mandatory)]
    [string]$Container,
    [Parameter(Mandatory)]
    [string]$Username
)

$InvokeWebRequestSplat = @{
    Uri     = "$($VaultAPIAddress)/sys/policies/password/$($VaultPasswordPolicy)/generate"
    Headers = @{'X-Vault-Token'="$VaultToken"} 
}
$NewPassword = (Invoke-WebRequest @InvokeWebRequestSplat | ConvertFrom-Json).data.password

$InvokeWebRequestSplat = @{
    Uri     = "$($VaultAPIAddress)/secret/data/$($Container)"
    Method  = 'POST'
    Headers = @{'X-Vault-Token'="$VaultToken"}
    Body    = @{
        data = @{
            "password.$($Username)" = $NewPassword
        }
    } | ConvertTo-Json
}
Invoke-WebRequest @InvokeWebRequestSplat

Return $NewPassword