W&B entity support (#2298)

* W&B entity support

* shorten wandb_entity to entity

Co-authored-by: Jan Hajek <jan.hajek@gmail.com>
Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>

train.py

@@ -134,6 +134,7 @@ def train(hyp, opt, device, tb_writer=None, wandb=None):
         wandb_run = wandb.init(config=opt, resume="allow",
                                project='YOLOv5' if opt.project == 'runs/train' else Path(opt.project).stem,
                                name=save_dir.stem,
+                               entity=opt.entity,
                                id=ckpt.get('wandb_id') if 'ckpt' in locals() else None)
     loggers = {'wandb': wandb}  # loggers dict
 
@@ -467,6 +468,7 @@ if __name__ == '__main__':
     parser.add_argument('--log-artifacts', action='store_true', help='log artifacts, i.e. final trained model')
     parser.add_argument('--workers', type=int, default=8, help='maximum number of dataloader workers')
     parser.add_argument('--project', default='runs/train', help='save to project/name')
+    parser.add_argument('--entity', default=None, help='W&B entity')
     parser.add_argument('--name', default='exp', help='save to project/name')
     parser.add_argument('--exist-ok', action='store_true', help='existing project/name ok, do not increment')
     parser.add_argument('--quad', action='store_true', help='quad dataloader')