import {Entity, model, property} from '@loopback/repository';
 @model()
export class User extends Entity {
  @property({
 type: 'object',
 id: true,
required: false,
})
_id: object;
@property({
type: 'string', 
required: false,
})
 email :string; 
@property({
type: 'string', 
required: false,
})
 password :string; 
@property({
type: 'string', 
required: false,
})
 username :string; 
constructor(data?: Partial<User>) {
super(data);
}
};