Get-InstagramAccessToken.ps1

function Get-InstagramAccessToken
{
    param
    (
        $clientId,
        $clientSecret,
        $redirectUri        
    )

    $accessCodeApiUri = "https://api.instagram.com/oauth/authorize/?client_id=$clientId&redirect_uri=$redirectUri&response_type=code"
    start $accessCodeApiUri
    $code = Read-Host -Prompt "Enter Code Query String Value"
    $formData = @{
        'client_id' = $clientId
        'client_secret' = $clientSecret
        'grant_type' = 'authorization_code'
        'redirect_uri' = $redirectUri
        'code' = $code
    }
    $uri = "https://api.instagram.com/oauth/access_token"
    $response = Invoke-WebRequest -Uri $uri -Method Post -Body $formData -ContentType "application/x-www-form-urlencoded"
    ($response.Content | ConvertFrom-Json).access_token
}