openDB method
Implementation
Future<DB?> openDB(
{Duration retryInterval = const Duration(seconds: 1),
int maxRetries = 10,
int maxConnections = 1}) async {
var dbType = software.trim().toLowerCase();
var connProvider = await DBConnectionProvider.getProvider(
dbType,
credential,
retryInterval: retryInterval,
maxRetries: maxRetries,
maxConnections: maxConnections,
);
if (connProvider == null) return null;
return DB(connProvider);
}