Update app.py

app.py

@@ -42,7 +42,7 @@ def generate_keys():
     hash_2 = calculate_hash(hash_1, hash_function="ripemd160")
     address = base58.b58encode(hash_2)
     address_im=qr.make_qr(txt=address)
-    address_im = overlay.text_overlay(address_im, "test test")
+    address_im = overlay.textover(address_im, "test test")
     #qr_link="test"
     priv_key = stegan.conv_im("private_key.png",data=private_key)
     pub_key = stegan.conv_im(address_im,data=public_key)