Wrong connection parameters

There is virtual environment with sqlalcemy and this package. Also clickhouse is running on localhost. There are two database. The first one is `default` and the second one is `foo` which has table `bar`. Try run
```python
from sqlalchemy import create_engine

e = create_engine('clickhouse://localhost:8123/foo')
c = e.connect()
k = c.execute('SHOW TABLES')

print(k.fetchall()) # []
````
The same thing with auth credentials. I guess the reason is the package do not provide connection credentials properly.