You might want your customers to log in to their OTM service pages directly from your web site. Here's the HTML code:
<form action="https://subdomain.qtn.net/customers/index.php" method="post">
Username:
<input name="login" type="text">
<br/>
Password:
<input name="pw" type="password">
<br/>
<input style="display: block;" name="submit_bt" value="Log In" id="loginbutton" type="submit">
</form>
Here is how it works with the resources' log-in:
<form action="https://subdomain.qtn.net/resources/index.php" method="post">
Username:
<input name="login" type="text">
<br/>
Password:
<input name="pw" type="password">
<br/>
<input style="display: block;" name="submit_bt" value="Log In" id="loginbutton" type="submit">
</form>
Please replace subdomain with your OTM subdomain.