diff --git a/silkaj/auth.py b/silkaj/auth.py
index b46dfa32927087635e9a4db8645d546e94baa6c0..a71c437b6ccd242e831ec9f9f1c617fcac3d26a4 100644
--- a/silkaj/auth.py
+++ b/silkaj/auth.py
@@ -59,19 +59,13 @@ def generate_auth_file(file):
     authfile = Path(file)
     pubkey_cksum = display_pubkey_and_checksum(key.pubkey)
     if authfile.is_file():
-        confirm(
-            "Would you like to erase "
-            + file
-            + " by an authfile corresponding to following pubkey `"
-            + pubkey_cksum
-            + "`?",
-            abort=True,
-        )
+        message = f"Would you like to erase {file} by an authfile corresponding \n\
+to following pubkey `{pubkey_cksum}`?"
+        confirm(message, abort=True)
     key.save_seedhex_file(file)
     print(
-        "Authentication file 'authfile' generated and stored in current\
- folder for following public key:",
-        pubkey_cksum,
+        f"Authentication file 'authfile' generated and stored in current\
+ folder for following public key: {pubkey_cksum}",
     )
 
 
@@ -86,7 +80,7 @@ def auth_by_auth_file(ctx):
     file = ctx.obj["AUTH_FILE_PATH"]
     authfile = Path(file)
     if not authfile.is_file():
-        sys.exit('Error: the file "' + file + '" does not exist')
+        sys.exit(f"Error: `{file}` file does not exist")
     filetxt = authfile.open("r").read()
 
     # two regural expressions for the PubSec format