from diffusers import AutoPipelineForText2Image
import torch

pipeline = AutoPipelineForText2Image.from_pretrained('black-forest-labs/FLUX.1-schnell', torch_dtype=torch.bfloat16).to('cuda')
pipeline.load_lora_weights('Octree/flux-schnell-lora', weight_name='flux-schnell-lora')
image = pipeline('A beautiful woman with a slight warming smile in a bustling cafe, 4k  [be4u7y]').images[0]
image.save("my_image.png")

For more details, including weighting, merging and fusing LoRAs, check the documentation on loading LoRAs in diffusers