# Functions
CreateInstance.
Returns (or creates) the singleton instance.
SqlX returns instance of sqlx.
ToNullString returns a null string (otherwise it would be an empty string).
# Variables
Charset for the connection.
.
Database is a db name to which you want to connect.
DebugLog for now unused.
Host for connection.
Location used for timestamps related functions.
.
Maximum open connections which app can have.
ParseTime defines if we need to parse time columns.
Password is a password used for connection.
Port used for connection.
Username is a username used for connection.