Hi @prakharsachan ,
In Declarative Automation Bundles YAML (formerly known as Databricks Assets Bundles) you can only define secret scopes:

If you want to read secrets from secret scope you can use dbutils in python script:
password = dbutils.secrets.get(scope = "<scope-name>", key = "<key-name>")
If you're talking more about devops pipeline you can also use databricks cli to read secret in following way:
databricks secrets get-secret <scope-name> <key-name> | jq -r .value | base64 --decode
More information you can find below:
Secret management | Databricks on AWS