LGTM as far as the description of the service and security goes.
You could possibly mention that the 12-character "quick link" is using a 0-knowledge transfer of data method, avoiding key disclosure.
In detail: to transfer the account credentials and secret key it uses a protocol called
J-PAKE, which prevents any system except the sending and receiving one from being able to learn the contents of the transferred data (the J-PAKE server never knows what data is being transferred because it is end-to-end encrypted, and the server just hands over encrypted data blobs from one to another).
"The world will not be destroyed by those who do evil, but by those who watch them without doing anything." - Albert Einstein
"Seek wisdom, not knowledge. Knowledge is of the past; wisdom is of the future." -- Native American proverb
"Linux makes everything difficult." -- Lyceus Anubite