I am working through implementing the How to Use section from the Facebook Detr Resnet 50 model card here: https://huggingface.co/facebook/detr-resnet-50 and am getting the error below when calling DetrForObjectDetection.from_pretrained('facebook/detr-resnet-50').
Even after I pip install timm. Any suggestions or help is welcomed 
ImportError                               Traceback (most recent call last)
<ipython-input-41-ec07e43ae43f> in <module>()
----> 1 DetrModel.from_pretrained()

1 frames
/usr/local/lib/python3.7/dist-packages/transformers/file_utils.py in requires_backends(obj, backends)
    681     name = obj.__name__ if hasattr(obj, "__name__") else obj.__class__.__name__
    682     if not all(BACKENDS_MAPPING[backend][0]() for backend in backends):
--> 683         raise ImportError("".join([BACKENDS_MAPPING[backend][1].format(name) for backend in backends]))
    684 
    685 

ImportError: 
DetrModel requires the timm library but it was not found in your environment. You can install it with pip:
`pip install timm`


Many thanks!