Primary Backend

User should be able to

1. Sign up/Sign in
2. See their public address created via an MPC
3. As the backend to sign a txn
   1. Send SOL
   2. Send Tokens
   3. Get quote and Swap on JUP

Indexer

You are also supposed to index the user balances in a postgres DB. All token balances should be returned to the frontend from postgres.