Update README with usage

README.md

@@ -45,4 +45,25 @@ TRON is a blockchain-based operating system that eliminates the middleman, reduc
 who founded the roanoke settlement?
 
 ### ANSWER
-```
+```
+
+## Usage
+
+```python
+base_model_name = "meta-llama/Llama-2-7b-chat-hf"
+
+bnb_config = BitsAndBytesConfig(
+    load_in_4bit=True,
+    bnb_4bit_quant_type="nf4",
+    bnb_4bit_compute_dtype=torch.bfloat16,
+)
+
+base_model = AutoModelForCausalLM.from_pretrained(
+    base_model_name,
+    quantization_config=bnb_config,
+    device_map="auto",
+    trust_remote_code=True,
+)
+
+model = PeftModel.from_pretrained(base_model, "mkly/crypto-sales")
+```