## Preflight checks for Trino

URL: https://docs.atlan.com/apps/connectors/database/trino/references/preflight-checks-for-trino

> Before [running the Trino crawler](/apps/connectors/database/trino/how-tos/crawl-trino), you can run [preflight checks](/product/connections/concepts/wha.

Before [running the Trino crawler](https://docs.atlan.com/llms/connectors/trino/crawl-trino/llms.txt), you can run [preflight checks](https://docs.atlan.com/llms/catalog/connector-capabilities/what-are-preflight-checks/llms.txt) to perform the necessary technical validations. The following preflight checks are completed:

## Catalogs and schemas check

✅ `Check successful`

❌ `Check failed for $missingObjectName`

## Authentication check

Atlan validates the authentication method configured for your Trino connection:

### Basic authentication

- ✅ **Username and password validation**: Verifies that the provided credentials are valid and have the necessary permissions to access Trino catalogs and schemas.

### JWT authentication 

- ✅ **JWT token validation**: Verifies that the provided JWT token is valid, not expired, and contains the required claims.
- ✅ **Claims validation**: Ensures the JWT token contains the necessary claims for Trino authentication.

❌ **Authentication failed**: The provided credentials or JWT token are invalid, expired, or lack the necessary permissions.

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