diff --git a/allianceauth/services/modules/smf/manager.py b/allianceauth/services/modules/smf/manager.py
index 2e37c94a..1c79e632 100644
--- a/allianceauth/services/modules/smf/manager.py
+++ b/allianceauth/services/modules/smf/manager.py
@@ -73,15 +73,15 @@ class SmfManager:
 
     @classmethod
     def create_group(cls, groupname):
-        logger.debug("Creating smf group %s" % groupname)
+        logger.debug(f"Creating smf group {groupname}")
         cursor = connections['smf'].cursor()
         cursor.execute(cls.SQL_ADD_GROUP, [groupname, groupname])
-        logger.info("Created smf group %s" % groupname)
+        logger.info(f"Created smf group {groupname}")
         return cls.get_group_id(groupname)
 
     @classmethod
     def get_group_id(cls, groupname):
-        logger.debug("Getting smf group id for groupname %s" % groupname)
+        logger.debug(f"Getting smf group id for groupname {groupname}")
         cursor = connections['smf'].cursor()
         cursor.execute(cls.SQL_GET_GROUP_ID, [groupname])
         row = cursor.fetchone()
@@ -90,14 +90,14 @@ class SmfManager:
 
     @classmethod
     def check_user(cls, username):
-        logger.debug("Checking smf username %s" % username)
+        logger.debug(f"Checking smf username {username}")
         cursor = connections['smf'].cursor()
         cursor.execute(cls.SQL_USER_ID_FROM_USERNAME, [cls.santatize_username(username)])
         row = cursor.fetchone()
         if row:
-            logger.debug("Found user %s on smf" % username)
+            logger.debug(f"Found user {username} on smf")
             return True
-        logger.debug("User %s not found on smf" % username)
+        logger.debug(f"User {username} not found on smf")
         return False
 
     @classmethod
@@ -110,7 +110,7 @@ class SmfManager:
 
     @classmethod
     def get_user_id(cls, username):
-        logger.debug("Getting smf user id for username %s" % username)
+        logger.debug(f"Getting smf user id for username {username}")
         cursor = connections['smf'].cursor()
         cursor.execute(cls.SQL_USER_ID_FROM_USERNAME, [username])
         row = cursor.fetchone()
@@ -118,7 +118,7 @@ class SmfManager:
             logger.debug(f"Got smf user id {row[0]} for username {username}")
             return row[0]
         else:
-            logger.error("username %s not found on smf. Unable to determine user id ." % username)
+            logger.error(f"username {username} not found on smf. Unable to determine user id .")
             return None
 
     @classmethod
@@ -130,12 +130,12 @@ class SmfManager:
         out = {}
         for row in rows:
             out[row[1]] = row[0]
-        logger.debug("Got smf groups %s" % out)
+        logger.debug(f"Got smf groups {out}")
         return out
 
     @classmethod
     def get_user_groups(cls, userid):
-        logger.debug("Getting smf user id %s groups" % userid)
+        logger.debug(f"Getting smf user id {userid} groups")
         cursor = connections['smf'].cursor()
         cursor.execute(cls.SQL_GET_USER_GROUPS, [userid])
         out = [row[0] for row in cursor.fetchall()]
@@ -144,8 +144,11 @@ class SmfManager:
 
     @classmethod
     def add_user(cls, username, email_address, groups, characterid):
-        logger.debug("Adding smf user with member_name {}, email_address {}, characterid {}".format(
-            username, email_address, characterid))
+        logger.debug(
+            f"Adding smf user with member_name {username}, "
+            f"email_address {email_address}, "
+            f"characterid {characterid}"
+        )
         cursor = connections['smf'].cursor()
         username_clean = cls.santatize_username(username)
         passwd = cls.generate_random_pass()
@@ -154,42 +157,45 @@ class SmfManager:
         register_date = cls.get_current_utc_date()
         # check if the username was simply revoked
         if cls.check_user(username) is True:
-            logger.warning("Unable to add smf user with username %s - already exists. Updating user instead." % username)
+            logger.warning(f"Unable to add smf user with username {username} - already exists. Updating user instead.")
             cls.__update_user_info(username_clean, email_address, pwhash)
         else:
             try:
                 cursor.execute(cls.SQL_ADD_USER,
                                 [username_clean, pwhash, email_address, register_date, username_clean])
                 cls.add_avatar(username_clean, characterid)
-                logger.info("Added smf member_name %s" % username_clean)
+                logger.info(f"Added smf member_name {username_clean}")
                 cls.update_groups(username_clean, groups)
             except Exception as e:
-                logger.warning("Unable to add smf user %s: %s" % username_clean, e)
+                logger.warning(f"Unable to add smf user {username_clean}: {e}")
                 pass
         return username_clean, passwd
 
     @classmethod
     def __update_user_info(cls, username, email_address, passwd):
         logger.debug(
-            f"Updating smf user {username} info: username {email_address} password of length {len(passwd)}")
+            f"Updating smf user {username} info: "
+            f"username {email_address} "
+            f"password of length {len(passwd)}"
+        )
         cursor = connections['smf'].cursor()
         try:
             cursor.execute(cls.SQL_DIS_USER, [email_address, passwd, username])
-            logger.info("Updated smf user %s info" % username)
+            logger.info(f"Updated smf user {username} info")
         except Exception as e:
-            logger.exception("Unable to update smf user %s info. (%s)" % username, e)
+            logger.exception(f"Unable to update smf user {username} info. ({e})")
             pass
 
     @classmethod
     def delete_user(cls, username):
-        logger.debug("Deleting smf user %s" % username)
+        logger.debug(f"Deleting smf user {username}")
         cursor = connections['smf'].cursor()
 
         if cls.check_user(username):
             cursor.execute(cls.SQL_DEL_USER, [username])
-            logger.info("Deleted smf user %s" % username)
+            logger.info(f"Deleted smf user {username}")
             return True
-        logger.error("Unable to delete smf user %s - user not found on smf." % username)
+        logger.error(f"Unable to delete smf user {username} - user not found on smf.")
         return False
 
     @classmethod
@@ -235,7 +241,7 @@ class SmfManager:
 
     @classmethod
     def disable_user(cls, username):
-        logger.debug("Disabling smf user %s" % username)
+        logger.debug(f"Disabling smf user {username}")
         cursor = connections['smf'].cursor()
 
         password = cls.generate_random_pass()
@@ -245,15 +251,15 @@ class SmfManager:
             cursor.execute(cls.SQL_DIS_USER, [revoke_email, pwhash, username])
             cls.get_user_id(username)
             cls.update_groups(username, [])
-            logger.info("Disabled smf user %s" % username)
+            logger.info(f"Disabled smf user {username}")
             return True
         except TypeError:
-            logger.exception("TypeError occured while disabling user %s - failed to disable." % username)
+            logger.exception(f"TypeError occured while disabling user {username} - failed to disable.")
             return False
 
     @classmethod
     def update_user_password(cls, username, characterid, password=None):
-        logger.debug("Updating smf user %s password" % username)
+        logger.debug(f"Updating smf user {username} password")
         cursor = connections['smf'].cursor()
         if not password:
             password = cls.generate_random_pass()
@@ -261,10 +267,12 @@ class SmfManager:
             username_clean = cls.santatize_username(username)
             pwhash = cls.gen_hash(username_clean, password)
             logger.debug(
-                f"Proceeding to update smf user {username} password with pwhash starting with {pwhash[0:5]}")
+                f"Proceeding to update smf user {username} "
+                f"password with pwhash starting with {pwhash[0:5]}"
+            )
             cursor.execute(cls.SQL_UPDATE_USER_PASSWORD, [pwhash, username])
             cls.add_avatar(username, characterid)
-            logger.info("Updated smf user %s password." % username)
+            logger.info(f"Updated smf user {username} password.")
             return password
-        logger.error("Unable to update smf user %s password - user not found on smf." % username)
+        logger.error(f"Unable to update smf user {username} password - user not found on smf.")
         return ""