sequelize generic repository service

repositoryService.ts

type Constructor<T> = new (...args: any[]) => T;
type ModelType<T extends Model<T>> = Constructor<T> & typeof Model;


export interface IRepository<T extends Model> {
    get(id: string): Promise<T| null>;
    find(where: FindOptions<T>): Promise<T>;
    create(model: T): Promise<T>;
    update(key: any, model: T): Promise<T>;
}
export class RepositoryService<T extends Model<T>> implements IRepository<T>{
    constructor(protected model: ModelType<T>) {}
    get(id: string): Promise<T| null> {
      return this.model.findByPk<T>(id);

    }
    find(where: FindOptions<T>): Promise<T> {
        throw new Error('Method not implemented.');
    }
    create(model: T): Promise<T> {
        throw new Error('Method not implemented.');
    }
    update(key: any, model: T): Promise<T> {
        throw new Error('Method not implemented.');
    }

  }