Update app.py

app.py

@@ -63,8 +63,7 @@ st.subheader('1. We need an OpenAI API key: ')
 api_key = st.text_input('',placeholder='Enter your OpenAI API key', type='password', help="You can find your OpenAI API key here: https://platform.openai.com/api-keys. Or if you are provided with one by your organization.")
 st.caption('Never share your OpenAI API key to anyone. Note that usage of your OpenAI API key will be billed to your OpenAI account. Keep in mind that an image analysis costs approximately `$0.04`')
 
-# Initialize the OpenAI client with the API key
-client = OpenAI(api_key=api_key)
+
 # Initialize messages object
 messages = []
 
@@ -78,6 +77,8 @@ uploaded_files = st.file_uploader("", help='Up to five images only.', type=["jpg
 
 
 if api_key:
+    # Initialize the OpenAI client with the API key
+    client = OpenAI(api_key=api_key)    
     # load from disk
     docsearch = Chroma(persist_directory="./knowledge_base", embedding_function=OpenAIEmbeddings())