If the Employer Registered with PERM but has not yet received an email containing their username and password, they can email the DOL requesting it.
Here are the instructions:
Employer Username and Password Not Yet Received
Body of email:
We previously registered our company in the PERM system, but we have not yet received the username and password. Our company details are below:
Email address used to register:
Please forward me our username and password or let us know how to proceed.