Question: How to authenticate Infura API?

[crazyoptimist]

Here is our config.json file:

{
  "dbpath": "./db/store.sqlite",
  "infura": "https://mainnet.infura.io/v3/our-project-id",
  "tokens": [
    {
      "symbol": "WPSL",
      "contract": "0xc775c0c30840cb9f51e21061b054ebf1a00acc29",
      "scanFrom": 12244106,
      "interval" : 100
    }
  ]
}

There is no place to put infura project secret(maybe a dumb question), and I get zero results when I query for this info by:
/wpsl/0xc775c0c30840cb9f51e21061b054ebf1a00acc29/to/0x2d67F3906E325EdE331FE8a156ECe7Fc84Dd7Cf9

Please advice if I'm missing something above.
Thanks!

[crazyoptimist]

Found out that symbol should be uppercase, and it works now, but still want to get an answer for the above question, about secret.
Thanks