(Flutter) Creating SQFLite database automatically when a new project is created - sqlite

Question

I am building an app in which a user can create multiple projects.
I want each project to have its unique database, since although columns (there will be 6-7 columns) name will be the same, but the values under columns for a new project will be different.
How to create new SQFlite database each time when a user creates a new project?
Or is there some other better way to achieve to achieve this?
Here is my code for the database that i have manually created if you want to go through it:
class DatabaseHelper {
static final DatabaseHelper _instance = new DatabaseHelper.internal();
factory DatabaseHelper() => _instance;
final String tableUser = "userTable";
final String columnId = "id";
final String columnRuns = "runs";
static Database _db;
Future<Database> get db async {
if (_db != null) {
return _db;
}
_db = await initDb();
return _db;
}
DatabaseHelper.internal();
initDb() async {
Directory documentDirectory = await getApplicationDocumentsDirectory();
String path = join(documentDirectory.path,
"maindbnew.db"); //home://directory/files/maindb.db
var ourDb = await openDatabase(path, version: 1, onCreate: _onCreate);
return ourDb;
}
void _onCreate(Database db, int newVersion) async {
await db.execute(
"CREATE TABLE $tableUser($columnId INTEGER PRIMARY KEY, $columnRuns INTEGER)");
}
//CRUD - CREATE, READ, UPDATE, DELETE
//Insertion
Future<int> saveUser(User user) async {
var dbClient = await db;
int res = await dbClient.insert("$tableUser", user.toMap());
return res;
}
//Get Users
Future<List> getAllUsers() async {
var dbClient = await db;
var result = await dbClient.rawQuery("SELECT * FROM $tableUser");
return result.toList();
}
Future<int> getCount() async {
var dbClient = await db;
return Sqflite.firstIntValue(
await dbClient.rawQuery("SELECT COUNT(*) FROM $tableUser"));
}
Future<User> getUser(int id) async {
var dbClient = await db;
var result = await dbClient
.rawQuery("SELECT * FROM $tableUser WHERE $columnId = $id");
if (result.length == 0) return null;
return new User.fromMap(result.first);
}
Future<int> deleteUser(int id) async {
var dbClient = await db;
return await dbClient
.delete(tableUser, where: "$columnId = ?", whereArgs: [id]);
}
Future<int> updateUser(User user) async {
var dbClient = await db;
return await dbClient.update(tableUser, user.toMap(),
where: "$columnId = ?", whereArgs: [user.id]);
}
Future close() async {
var dbClient = await db;
return dbClient.close();
}
}
class User {
int _runs;
int _id;
User(this._runs);
User.map(dynamic obj) {
this._runs = obj['runs'];
this._id = obj['id'];
}
int get runs => _runs;
int get id => _id;
Map<String, dynamic> toMap() {
var map = new Map<String, dynamic>();
map["runs"] = _runs;
if (id != null) {
map["id"] = _id;
}
return map;
}
User.fromMap(Map<String, dynamic> map) {
this._runs = map["runs"];
this._id = map["id"];
}
}
P.S. I just have one column right now, I'll add more later.