Step 1: Login to  Namesarecheap  domain panel

Step 2: Click Domain Locking and make sure it's disabled.

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Step 3: Click Profile.

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Step 4: Click Change Ownership - All contact information will be intact so you will still be the owner, you're only changing the username for your profile.

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Step 5: Enter the new username and password (we require 10 or more characters for password)
> check the box Move all domains associated with this NAC Passport > Click Change Owner

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Done!

This will be your new username and password. Password reset not required.