Access to Pytorch Lightning auto_lr_find functionality seems broken [BUG]

[solalatus]

Describe the bug

When using Pytorch based models, Lightning's auto_lr_find functionality does not seem to be accessible.

To Reproduce
When initializing a Pytorch based model, eg.:

model_nhits = NHiTSModel(... pl_trainer_kwargs = {"auto_lr_find":True,...} ...)

The LR tuning feature described here does not seem to get executed.

By manual tries to execute the tuning procedure by:

lr_finder = model_nhits.model.trainer.tuner.lr_find(model_nhits.model, train_dataloaders=[model_nhits.model.trainer.train_dataloader])

one gets the error:
MisconfigurationException: If learning rate/lr in 'model' or 'model.hparams' isn't overridden when 'auto_lr_find=True',...

Expected behavior

• auto_lr_find to have effect
• manual access to .tune() and it's plot output, which is quite useful for say setting up max learning rates in case of 1cycle policy.

System (please complete the following information):

• Python version: 3.7.15
• darts version 0.22.0

Additional context
It is entirely possible, that there is an obvious way to get these things to work, so please point me to any if! I found sadly none.

[solalatus]

In a really not intuitive way, it happens to work.

For further reference:

lr_finder = model_nhits.model.trainer.tuner.lr_find(model_nhits.model, train_dataloaders=model_nhits.model.trainer._data_connector._train_dataloader_source.instance)