from diffusers import AutoPipelineForText2Image
import torch

pipeline = AutoPipelineForText2Image.from_pretrained('black-forest-labs/FLUX.1-dev', torch_dtype=torch.bfloat16).to('cuda')
pipeline.load_lora_weights('soloai1/v3flux', weight_name='my_first_flux_lora_v1.safetensors')
image = pipeline(' A top down aerial view DND battle map, DND battle map. Depicts a fantastical building complex designed like giant seashells situated on a sandy seabed or beach, surrounded by coral-like formations. Notable elements include a large central domed structure resembling a clam or scallop shell, smaller surrounding shell-shaped sections, stairs leading up, sandy ground with rocks and smaller shells, and underwater flora. The atmosphere is whimsical, aquatic, and unique. The scene is set during the daytime (possibly underwater), rendered in a detailed fantasy style with linework.').images[0]
image.save("my_image.png")

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