src/main/java/com/github/ddth/cql/internal/ClusterIdentifier.java
public static ClusterIdentifier getInstance(String hostsAndPorts, String username,
            String password) {
        return getInstance(hostsAndPorts, username, password, null);
    }
public static ClusterIdentifier getInstance(String hostsAndPorts, String username,
            String password) {
        return getInstance(hostsAndPorts, username, password, null);
    }
Helper method to get an instance of {@link ClusterIdentifier}.

@param hostsAndPorts
example {@code "localhost:9042,host2,host3:19042"}
@param username
username to authenticate against Cassandra cluster
@param password
password to authenticate against Cassandra cluster
@return