Canton's storage is configured using Slick's configuration. This offers an expansive set of options allowing you to configure a connection pool, data source, or JDBC driver. The ledger-api configuration however only takes a JDBC url. LedgerApiJdbcUrl generator attempts to scrape together enough from Slick's configuration to generate a jdbc url for the targeted database (currently either H2 or Postgres). It also adds a schema specification to point the ledger-api server at a distinct schema from canton allowing it to be managed separately. Although it is expected a JDBC url will be generated for almost all circumstances, if this process fails or an advanced configuration is required the com.digitalasset.canton.config.DbParametersConfig.ledgerApiJdbcUrl configuration can be explicitly set and this will be used instead. This manually configured url **must** specify using the schema of ledger_api.