Removed the ability for duplicate accounts being able to be made

controllers/database/database.py

@@ -23,6 +23,10 @@ class DatabaseController(ABC):
             setattr(obj, attr, value)
         return obj
     
+    """
+        Set of CRUD methods to allow for Data manipulation on the backend
+    """
+
     @abstractmethod
     def create(self):
         pass

controllers/web/endpoints.py

@@ -49,6 +49,12 @@ def display_signup(error: str = None):
 @blueprint.post('/signup')
 def signup():
     database = UserController()
+
+    # User already exists
+    if database.read(request.form['username']) != None:
+        error = "User, " + request.form['username'] + " already exists"
+        return display_signup(error)
+
     database.create(Customer(
         0,
         request.form['username'],
@@ -64,6 +70,7 @@ def signup():
     return redirect("/login", code=307)
 
 
+### SIGN OUT FUNCTIONALITY
 # Function responsible for handling logouts from the site
 @blueprint.route('/logout')
 def logout():