// check user credentials and return fake jwt token if valid
    let found: User = USERS.find((user: User) => {return (params.username === user.username);});
    if (found) {
      if(params.password === found.password) {
        connection.mockRespond(new Response(
          new ResponseOptions({status: 200, body: {token: 'fake-token-jwt', user: found}})
        ));
      }else{
        connection.mockError(new MockError(new ResponseOptions({type:ResponseType.Error, status:400, body: JSON.stringify({code: 2, message: 'The password does not match '})})));
      }
    } else {
      connection.mockError(new MockError(new ResponseOptions({type:ResponseType.Error, status:400, body: JSON.stringify({code: 1, message: 'Username does not exists'})})));
    }

  }

  if (connection.request.url.endsWith('/api/authenticate/logout') && connection.request.method === RequestMethod.Post) {
    let params = JSON.parse(connection.request.getBody());
    connection.mockRespond(new Response(
      new ResponseOptions({status: 200, body: true})
    ));
  }
}, 500);`