diff --git a/ref-test/app/models/entry.py b/ref-test/app/models/entry.py
new file mode 100644
index 0000000..5bcab96
--- /dev/null
+++ b/ref-test/app/models/entry.py
@@ -0,0 +1,49 @@
+from main import db
+
+class Entry(db.Model):
+
+    id = db.Column(db.String(36), primary_key=True)
+    first_name = db.Column(db.String(128), nullable=False)
+    surname = db.Column(db.String(128), nullable=False)
+    email = db.Column(db.String(128), nullable=False)
+    club = db.Column(db.String(128), nullable=True)
+    test_id = db.Column(db.String(36), db.ForeignKey('test.id'))
+    test_code = db.Column(db.String(36), db.ForeignKey('test.test_code'))
+    user_code = db.Column(db.String(6), nullable=True)
+    start_time = db.Column(db.DateTime, nullable=False)
+    end_time = db.Column(db.DateTime, nullable=True)
+    status = db.Column(db.String(16), nullable=True)
+    late_ignore = db.Column(db.Boolean, default=False, nullable=True)
+    answers = db.Column(JsonEncodedDict, nullable=True)
+    
+    @property
+    def set_first_name(self): raise AttributeError('set_first_name is not a readable attribute.')
+
+    set_first_name.setter
+    def set_first_name(self, name:str): self.first_name = encrypt(name)
+
+    def get_first_name(self): return decrypt(self.first_name)
+
+    @property
+    def set_surname(self): raise AttributeError('set_first_name is not a readable attribute.')
+
+    set_surname.setter
+    def set_surname(self, name:str): self.surname = encrypt(name)
+
+    def get_surname(self): return decrypt(self.surname)
+
+    @property
+    def set_email(self): raise AttributeError('set_email is not a readable attribute.')
+
+    set_name.setter
+    def set_email(self, email:str): self.email = encrypt(email)
+
+    def get_email(self): return decrypt(self.email)
+
+    @property
+    def set_club(self): raise AttributeError('set_club is not a readable attribute.')
+
+    set_name.setter
+    def set_club(self, club:str): self.club = encrypt(club)
+
+    def get_club(self): return decrypt(self.club)
\ No newline at end of file
diff --git a/ref-test/app/models/test.py b/ref-test/app/models/test.py
new file mode 100644
index 0000000..8ab15b1
--- /dev/null
+++ b/ref-test/app/models/test.py
@@ -0,0 +1,112 @@
+class Test:
+    
+    def __init__(self, _id=None, start_date=None, expiry_date=None, time_limit=None, creator=None, dataset=None):
+        self._id = _id
+        self.start_date = start_date
+        self.expiry_date = expiry_date
+        self.time_limit = None if time_limit == 'none' or time_limit == '' or time_limit == None else int(time_limit)
+        self.creator = creator
+        self.dataset = dataset
+    
+    def create(self):
+        from main import app, db
+        test = {
+            '_id': self._id,
+            'date_created': datetime.today(),
+            'start_date': self.start_date,
+            'expiry_date': self.expiry_date,
+            'time_limit': self.time_limit,
+            'creator': encrypt(self.creator),
+            'test_code': secrets.token_hex(6).upper(),
+            'dataset': self.dataset
+        }
+        if db.tests.insert_one(test):
+            dataset_file_path = os.path.join(app.config["DATA_FILE_DIRECTORY"],self.dataset)
+            with open(dataset_file_path, 'r') as dataset_file:
+                data = loads(dataset_file.read())
+            data['meta']['tests'].append(self._id)
+            with open(dataset_file_path, 'w') as dataset_file:
+                dump(data, dataset_file, indent=2)
+            flash(f'Created a new exam with Exam Code <strong>{self.render_test_code(test["test_code"])}</strong>.', 'success')
+            return jsonify({'success': test}), 200
+        return jsonify({'error': f'Could not create exam. An error occurred.'}), 400
+
+    def add_time_adjustment(self, time_adjustment):
+        from main import db
+        user_code = secrets.token_hex(3).upper()
+        adjustment = {
+            user_code: time_adjustment
+        }
+        if db.tests.find_one_and_update({'_id': self._id}, {'$set': {'time_adjustments': adjustment}},upsert=False):
+            flash(f'Time adjustment for {time_adjustment} minutes has been added. This can be enabled using the user code {user_code}.')
+            return jsonify({'success': adjustment})
+        return jsonify({'error': 'Failed to add the time adjustment. An error occurred.'}), 400
+
+    def remove_time_adjustment(self, user_code):
+        from main import db
+        if db.tests.find_one_and_update({'_id': self._id}, {'$unset': {f'time_adjustments.{user_code}': {}}}):
+            message = 'Time adjustment has been deleted.'
+            flash(message, 'success')
+            return jsonify({'success': message})
+        return jsonify({'error': 'Failed to delete the time adjustment. An error occurred.'}), 400
+
+    def render_test_code(self, test_code):
+        return '—'.join([test_code[:4], test_code[4:8], test_code[8:]])
+    
+    def parse_test_code(self, test_code):
+        return test_code.replace('—', '')
+    
+    def delete(self):
+        from main import app, db
+        test = db.tests.find_one({'_id': self._id})
+        if 'entries' in test:
+            if test['entries']:
+                return jsonify({'error': 'Cannot delete an exam that has entries submitted to it.'}), 400
+        if self.dataset is None:
+            self.dataset = db.tests.find_one({'_id': self._id})['dataset']
+        if db.tests.delete_one({'_id': self._id}):
+            dataset_file_path = os.path.join(app.config["DATA_FILE_DIRECTORY"],self.dataset)
+            with open(dataset_file_path, 'r') as dataset_file:
+                data = loads(dataset_file.read())
+            data['meta']['tests'].remove(self._id)
+            with open(dataset_file_path, 'w') as dataset_file:
+                dump(data, dataset_file, indent=2)
+            message = 'Deleted exam.'
+            flash(message, 'alert')
+            return jsonify({'success': message}), 200
+        return jsonify({'error': f'Could not create exam. An error occurred.'}), 400
+
+    def update(self):
+        from main import db
+        test = {}
+        updated = []
+        if not self.start_date == '' and self.start_date is not None:
+            test['start_date'] = self.start_date
+            updated.append('start date')
+        if not self.expiry_date == '' and self.expiry_date is not None:
+            test['expiry_date'] = self.expiry_date
+            updated.append('expiry date')
+        if not self.time_limit == '' and self.time_limit is not None:
+            test['time_limit'] = int(self.time_limit)
+            updated.append('time limit')
+        output = ''
+        if len(updated) == 0:
+            flash(f'There were no changes requested for your account.', 'alert'), 200
+            return jsonify({'success': 'There were no changes requested for your account.'}), 200
+        elif len(updated) == 1:
+            output = updated[0]
+        elif len(updated) == 2:
+            output = ' and '.join(updated)
+        elif len(updated) > 2:
+            output = updated[0]
+            for index in range(1,len(updated)):
+                if index < len(updated) - 2:
+                    output = ', '.join([output, updated[index]])
+                elif index == len(updated) - 2:
+                    output = ', and '.join([output, updated[index]])
+                else:
+                    output = ''.join([output, updated[index]])
+        db.tests.find_one_and_update({'_id': self._id}, {'$set': test})
+        _output = f'The {output} of the test {"has" if len(updated) == 1 else "have"} been updated.'
+        flash(_output)
+        return jsonify({'success': _output}), 200
\ No newline at end of file
diff --git a/ref-test/app/models/user.py b/ref-test/app/models/user.py
new file mode 100644
index 0000000..1be2392
--- /dev/null
+++ b/ref-test/app/models/user.py
@@ -0,0 +1,96 @@
+from ..modules import db
+from ..tools.encryption import decrypt, encrypt
+from ..tools.logs import write
+
+import secrets
+
+from flask import flash, jsonify, session
+from flask.helpers import url_for
+from flask_login import UserMixin, login_user, logout_user
+from werkzeug.security import check_password_hash, generate_password_hash
+
+class User(UserMixin, db.Model):
+    id = db.Column(db.String(36), primary_key=True)
+    username = db.Column(db.String(128), nullable=False)
+    password = db.Column(db.String(128), nullable=False)
+    email = db.Column(db.String(128), nullable=False)
+    reset_token = db.Column(db.String(20), nullable=True)
+    verification_token = db.Column(db.String(20), nullable=True)
+
+    def __repr__(self):
+        return f'<user {self.username}> was added with <id {self.id}>.'
+    
+    @property
+    def set_username(self): raise AttributeError('set_username is not a readable attribute.')
+    
+    set_username.setter
+    def set_username(self, username:str): self.username = encrypt(username)
+    
+    def get_username(self): return decrypt(self.username)
+
+    @property
+    def set_password(self): raise AttributeError('set_password is not a readable attribute.')
+
+    set_password.setter
+    def set_password(self, password:str): self.password = generate_password_hash(password, method="sha256")
+
+    def verify_password(self, password:str): return check_password_hash(self.password, password)
+
+    @property
+    def set_email(self): raise AttributeError('set_email is not a readable attribute.')
+    
+    set_email.setter
+    def set_email(self, email:str): self.email = encrypt(email)
+    
+    def get_email(self): return decrypt(self.email)
+
+    def register(self):
+        users = User.query.all()
+        for user in users:
+            if user.get_username() == self.get_username():
+                return False, f'Username {self.get_username()} already in use.'
+            elif user.get_email() == self.get_email():
+                return False, f'Email address {self.get_email()} already in use.'
+        db.session.add(self)
+        db.session.commit()
+        write('users.log', f'User \'{self.get_username()}\' was created with id \'{self.id}\'.')
+        return True, f'User {self.get_username()} was created successfully.'
+
+    def login(self, remember:bool=False):
+        self.authenticated = True
+        db.session.add(self)
+        db.session.commit()
+        login_user(self, remember = remember)
+        write('users.log', f'User \'{self.get_username()}\' has logged in.')
+        flash(message=f'Welcome {self.get_username()}', category='success')
+    
+    def logout(self):
+        self.authenticated = False
+        db.session.add(self)
+        db.session.commit()
+        session['remembered_username'] = self.get_username()
+        logout_user()
+        write('users.log', f'User \'{self.get_username()}\' has logged out.')
+        flash(message='You have successfully logged out.', category='success')
+    
+    def reset_password(self):
+        new_password = secrets.token_hex(12)
+        self.set_password(new_password)
+        self.reset_token = secrets.token_urlsafe(16)
+        self.verification_token = secrets.token_urlsafe(16)
+        db.session.commit()
+        print('Password', new_password)
+        print('Reset Token', self.reset_token)
+        print('Verification Token', self.verification_token)
+        print('Reset Link', f'{url_for("auth._reset", token=self.reset_token, verification=self.verification_token, _external=True)}')
+        return jsonify({'success': 'Your password reset link has been generated.'}), 200
+
+    def clear_reset_tokens(self):
+        self.reset_token = self.verification_token = None
+        db.session.commit()
+    
+    def delete(self):
+        username = self.get_username()
+        db.session.delete(self)
+        db.session.commit()
+        write('users.log', f'User \'{username}\' was deleted.') # TODO add current user