getUserProfilePicture method Null safety

Future<String> getUserProfilePicture(
  1. int id
)

Get a user's profile picture. id must be the id of the user to get the picture. Reference: https://github.com/glpi-project/glpi/blob/master/apirest.md#get-a-users-profile-picture

Implementation

Future<String> getUserProfilePicture(int id);