fix(cliapp): Show a message if a user can not be found

cliapp/cliapp/cli.py

@@ -165,13 +165,16 @@ def show_user(email):
     :param email: Email address of the user to show
     """
     user = KratosUser.find_by_email(KRATOS_ADMIN, email)
-    print(user)
-    print("")
-    print(f"UUID:     {user.uuid}")
-    print(f"Username: {user.username}")
-    print(f"Updated:  {user.updated_at}")
-    print(f"Created:  {user.created_at}")
-    print(f"State:    {user.state}")
+    if user is not None:
+        print(user)
+        print("")
+        print(f"UUID:     {user.uuid}")
+        print(f"Username: {user.username}")
+        print(f"Updated:  {user.updated_at}")
+        print(f"Created:  {user.created_at}")
+        print(f"State:    {user.state}")
+    else:
+        print(f"User with email address '{email}' was not found")
 
 
 @user_cli.command("update")