style: run python linter & prettifier on backend code

server/core/auth.py

@@ -5,6 +5,7 @@ from flask_bcrypt import Bcrypt
 
 EMAIL_REGEX = re.compile(r"[^@]+@[^@]+\.[^@]+")
 
+
 class AuthManager:
     def __init__(self, db: PostgresConnector, bcrypt: Bcrypt):
         self.db = db
@@ -24,13 +25,13 @@ class AuthManager:
 
         if len(username) < 3:
             raise ValueError("Username must be longer than 3 characters")
-        
+
         if not EMAIL_REGEX.match(email):
             raise ValueError("Please enter a valid email address")
 
         if self.get_user_by_email(email):
             raise ValueError("Email already registered")
-        
+
         if self.get_user_by_username(username):
             raise ValueError("Username already taken")
 
@@ -38,20 +39,22 @@ class AuthManager:
 
     def authenticate_user(self, username, password):
         user = self.get_user_by_username(username)
-        if user and self.bcrypt.check_password_hash(user['password_hash'], password):
+        if user and self.bcrypt.check_password_hash(user["password_hash"], password):
             return user
         return None
-    
+
     def get_user_by_id(self, user_id):
         query = "SELECT id, username, email FROM users WHERE id = %s"
         result = self.db.execute(query, (user_id,), fetch=True)
         return result[0] if result else None
-    
+
     def get_user_by_username(self, username) -> dict:
-        query = "SELECT id, username, email, password_hash FROM users WHERE username = %s"
+        query = (
+            "SELECT id, username, email, password_hash FROM users WHERE username = %s"
+        )
         result = self.db.execute(query, (username,), fetch=True)
         return result[0] if result else None
-    
+
     def get_user_by_email(self, email) -> dict:
         query = "SELECT id, username, email, password_hash FROM users WHERE email = %s"
         result = self.db.execute(query, (email,), fetch=True)