prisma create code architecture

import { PrismaClient } from '@prisma/client';

const prisma = new PrismaClient();

class DB {
  // Method to create a user
  async createUser(name: string, email: string | null = null) {
    try {
      const newUser = await prisma.user.create({
        data: {
          name: name,
          email: email,
          is_premium: false,
          sessions: {
            create: []
          }
        }
      });
      return newUser;
    } catch (error) {
      console.error("Error creating user:", error);
      throw error;
    }
  }

  // Method to add session to a user
  async addSession(userId: number, session: { creation_date: Date, baseSnapshotId: number }) {
    try {
      const updatedUser = await prisma.user.update({
        where: { id: userId },
        data: {
          sessions: {
            create: { 
              creation_date: session.creation_date,
              baseSnapshotId: session.baseSnapshotId
            }
          }
        },
        include: {
          sessions: true
        }
      });
      return updatedUser;
    } catch (error) {
      console.error("Error adding session to user:", error);
      throw error;
    }
  }
}