Kotak Privy Online account opening and Choose your A.C. number

[hmmmmm]

I want to open a kotak privy account and the bank employee said that he will send a link and I can apply online with vkyc.
Can I choose my own personalised account number while applying online?
Is it legit privy or it's 811?
Anyone who have experience in opening kotak account online (other than 811) may also share their experience