I tried to get the list of the vouchers using api. Im using postman to test it out.
Ive added post login, auth code, access token, and get voucher. I test it out from login to get voucher code. The problem is the get voucher result.

The code goes on


i was expecting to have like this result: (im using powershell to double check and it works)

on this powershell code: 
this is a short version of the code
# Request: Get vouchers
try {
    $vouchersUrl = "$OMADA_URL/$OMADA_ID/api/v2/hotspot/sites/$SITE_ID/vouchers"
    $vouchersHeaders = @{
        "Content-Type" = "application/json"
        "Authorization" = "AccessToken=$ACCESSTOKEN"
    }
    $vouchersResponse = Invoke-RestMethod -Uri $vouchersUrl -Method Get -Headers $vouchersHeaders -WebSession $session -UseBasicParsing
    Write-Output ($vouchersResponse | ConvertTo-Json -Depth 10)
} catch {
    Write-Error "Failed to get vouchers: $_"
}

Im also confuse on this path using inspect element > network tab under the hotspot page

https://my-ip:port/omadadevice/api/v2/hotspot/sites/siteid/voucherGroups?currentPage=1&currentPageSize=10&searchField=name%2Ccode&_=1718552207755

the api/v2/hotspot/sites/$SITE_ID/vouchers will display the vouchergroups using powershell but on the postman it will show an html code
 and if use the api/v2/hotspot/sites/$SITE_ID/voucherGroups on powershell, it will work but on postman its shows html


This is my powershell code
 

# Ignore SSL warnings (not recommended for production environments)
if (-not ("TrustAllCertsPolicy" -as [type])) {
    Add-Type @"
    using System.Net;
    using System.Security.Cryptography.X509Certificates;
    public class TrustAllCertsPolicy : ICertificatePolicy {
        public bool CheckValidationResult(ServicePoint srvPoint, X509Certificate certificate, WebRequest request, int certificateProblem) {
            return true;
        }
    }
"@
    [System.Net.ServicePointManager]::CertificatePolicy = New-Object TrustAllCertsPolicy
}

# Set variables
$OMADA_URL = "https://ip:port"
$USERNAME = "user"
$PASSWORD = "pass"
$CLIENT_ID = "client id" # from application list
$CLIENT_SECRET = "client secret" # from application list
$OMADA_ID = "omada id" # from view open api attributes
$SITE_ID = "site id" # replace with your actual site ID

# Create a web session object
$session = New-Object Microsoft.PowerShell.Commands.WebRequestSession

# Login and obtain CSRF token and session ID
try {
    $loginUrl = "$OMADA_URL/openapi/authorize/login?client_id=$CLIENT_ID&omadac_id=$OMADA_ID"
    $loginBody = @{
        username = $USERNAME
        password = $PASSWORD
    } | ConvertTo-Json
    $loginResponse = Invoke-RestMethod -Uri $loginUrl -Method Post -Body $loginBody -ContentType "application/json" -WebSession $session -UseBasicParsing
    $CSRFTOKEN = $loginResponse.result.csrfToken
    $SESSIONID = $loginResponse.result.sessionId

    Write-Output "CSRFTOKEN=$CSRFTOKEN"
    Write-Output "SESSIONID=$SESSIONID"
} catch {
    Write-Error "Failed to login: $_"
    exit
}

# Obtain authorization code
try {
    $authCodeUrl = "$OMADA_URL/openapi/authorize/code?client_id=$CLIENT_ID&omadac_id=$OMADA_ID&response_type=code"
    $authHeaders = @{
        "Content-Type" = "application/json"
        "Csrf-Token" = $CSRFTOKEN
        "Cookie" = "TPOMADA_SESSIONID=$SESSIONID"
    }
    $authCodeResponse = Invoke-RestMethod -Uri $authCodeUrl -Method Post -Headers $authHeaders -WebSession $session -UseBasicParsing
    $AUTHCODE = $authCodeResponse.result

    Write-Output "AUTHCODE=$AUTHCODE"
} catch {
    Write-Error "Failed to obtain authorization code: $_"
    exit
}

# Obtain access token
try {
    $tokenUrl = "$OMADA_URL/openapi/authorize/token?grant_type=authorization_code&code=$AUTHCODE"
    $tokenBody = @{
        client_id = $CLIENT_ID
        client_secret = $CLIENT_SECRET
    } | ConvertTo-Json
    $tokenResponse = Invoke-RestMethod -Uri $tokenUrl -Method Post -Body $tokenBody -ContentType "application/json" -WebSession $session -UseBasicParsing
    $ACCESSTOKEN = $tokenResponse.result.accessToken
    $REFRESHTOKEN = $tokenResponse.result.refreshToken

    Write-Output "ACCESSTOKEN=$ACCESSTOKEN"
    Write-Output "REFRESHTOKEN=$REFRESHTOKEN"
} catch {
    Write-Error "Failed to obtain access token: $_"
    exit
}

# Request: Get vouchers
try {
    $vouchersUrl = "$OMADA_URL/$OMADA_ID/api/v2/hotspot/sites/$SITE_ID/voucherGroups?currentPage=1&currentPageSize=20"
    $vouchersHeaders = @{
        "Content-Type" = "application/json"
        "Authorization" = "AccessToken=$ACCESSTOKEN"
    }
    $vouchersResponse = Invoke-RestMethod -Uri $vouchersUrl -Method Get -Headers $vouchersHeaders -WebSession $session -UseBasicParsing
    Write-Output ($vouchersResponse | ConvertTo-Json -Depth 10)
} catch {
    Write-Error "Failed to get vouchers: $_"
}

# Request: Get dashboard tabs
try {
    $dashboardTabsUrl = "$OMADA_URL/openapi/v1/$OMADA_ID/sites/$SITE_ID/dashboard/tabs"
    $dashboardTabsHeaders = @{
        "Content-Type" = "application/json"
        "Authorization" = "AccessToken=$ACCESSTOKEN"
    }
    $dashboardTabsResponse = Invoke-RestMethod -Uri $dashboardTabsUrl -Method Get -Headers $dashboardTabsHeaders -WebSession $session -UseBasicParsing
    Write-Output ($dashboardTabsResponse | ConvertTo-Json -Depth 10)
} catch {
    Write-Error "Failed to get dashboard tabs: $_"
}

#The voucher wont work if theres no dashboard
#Added dashboards

# Request: Get dashboard without overall tabs
try {
    $dashboardWithoutOverallTabsUrl = "$OMADA_URL/openapi/v1/$OMADA_ID/sites/$SITE_ID/dashboard/without-overall-tabs"
    $dashboardWithoutOverallTabsHeaders = @{
        "Content-Type" = "application/json"
        "Authorization" = "AccessToken=$ACCESSTOKEN"
    }
    $dashboardWithoutOverallTabsResponse = Invoke-RestMethod -Uri $dashboardWithoutOverallTabsUrl -Method Get -Headers $dashboardWithoutOverallTabsHeaders -WebSession $session -UseBasicParsing
    Write-Output ($dashboardWithoutOverallTabsResponse | ConvertTo-Json -Depth 10)
} catch {
    Write-Error "Failed to get dashboard without overall tabs: $_"
}


Please help me out. We need a proper full api documentation