Get the default built-in connection.
Examples
# Clean up
DBI::dbDisconnect(polarssql_default_connection())
polarssql_default_connection()
#> <polarssql_connection>
#> tables:
# Register a Table
polarssql_register(mtcars = mtcars)
polarssql_default_connection()
#> <polarssql_connection>
#> tables: mtcars
# Clean up
polarssql_unregister("mtcars")
polarssql_default_connection()
#> <polarssql_connection>
#> tables: