What is this Api secret

Can anyone explain what is this api secret and where do I get that
const apiSecret = getEnvOrThrow(“FIREBLOCKS_API_SECRET”).replace(/\n/g, “\n”);

const apiKeyCmc = getEnvOrThrow(“CMC_PRO_API_KEY”);

const apiKeyNcwSigner = getEnvOrThrow(“FIREBLOCKS_API_KEY_NCW_SIGNER”);

const apiKeyNcwAdmin = getEnvOrThrow(“FIREBLOCKS_API_KEY_NCW_ADMIN”);

const apiBase = process.env.FIREBLOCKS_API_BASE_URL;

Hi Vivek,
The fireblocks secret is the private key material generated while creating the CSR file which is needed to create API users.

https://support.fireblocks.io/hc/en-us/articles/4407823826194-Adding-new-API-users

The secret key is used to authenticate the API users.