diff --git a/requirements.txt b/requirements.txt
index 8051e01..35549e9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,10 +3,12 @@ boto3
 cryptography
 docopt
 firebase-admin
+flask-login
 flask-sqlalchemy
 grpcio-status
 gunicorn
 pip-chill
+pycryptodome
 pyrebase
 python-dotenv
 typing-extensions
diff --git a/src/__init__.py b/src/__init__.py
index 68f8766..1c38246 100644
--- a/src/__init__.py
+++ b/src/__init__.py
@@ -2,6 +2,7 @@
 
 from config import Config
 from src.extensions import db
+from src.extensions import login_manager
 
 from dotenv import load_dotenv
 
@@ -23,6 +24,8 @@ def create_app(config=Config()):
     with app.app_context():
         db.create_all()
 
+    login_manager.init_app(app)
+
     from src.clubs import bp as clubs_bp
     app.register_blueprint(blueprint=clubs_bp, url_prefix='/clubs')
 
diff --git a/src/extensions.py b/src/extensions.py
index 37a2561..9a2d650 100644
--- a/src/extensions.py
+++ b/src/extensions.py
@@ -1,7 +1,9 @@
 from flask_sqlalchemy import SQLAlchemy
 from venmo_api import Client
+from flask_login import LoginManager
 
 import os
 
 db = SQLAlchemy()
 client = Client(access_token=os.environ["VENMO_TOKEN"], )
+login_manager = LoginManager()
diff --git a/src/models/club.py b/src/models/club.py
index 220e4cc..8f77d9c 100644
--- a/src/models/club.py
+++ b/src/models/club.py
@@ -1,4 +1,4 @@
-import json
+from flask_login import UserMixin
 
 from src import db
 from .fundraiser import Fundraiser
@@ -10,7 +10,7 @@
                                           )
 
 
-class Club(db.Model):
+class Club(db.Model, UserMixin):
     __tablename__ = 'club'
 
     id = db.Column(db.Integer, primary_key=True)
@@ -22,6 +22,24 @@ class Club(db.Model):
 
     fundraisers = db.relationship('Fundraiser', cascade='delete')
 
+    authenticated = db.Column(db.Boolean, nullable=False, default=False)
+
+    @property
+    def is_authenticated(self):
+        """
+        If the user is authenticated.
+        :return: True if authenticated. False otherwise.
+        """
+        return self.authenticated
+
+    @property
+    def is_anonymous(self):
+        """
+        Return whether the student cna be anonymous
+        :return: False, because anonymity is not supported
+        """
+        return False
+
     def serialize(self, exclude_venmo_username=False, simplified=False):
         """
         A serialized the output for the club entry.
diff --git a/src/models/student.py b/src/models/student.py
index ffb9486..847787d 100644
--- a/src/models/student.py
+++ b/src/models/student.py
@@ -1,8 +1,10 @@
+from flask_login import UserMixin
+
 from src import db
 from .club import student_club_association_table
 
 
-class Student(db.Model):
+class Student(db.Model, UserMixin):
     __tablename__ = 'student'
 
     id = db.Column(db.Integer, primary_key=True)
@@ -11,6 +13,24 @@ class Student(db.Model):
     venmo_username = db.Column(db.String, nullable=False, unique=True)
     clubs = db.relationship("Club", secondary=student_club_association_table, back_populates='members')
 
+    authenticated = db.Column(db.Boolean, nullable=False, default=False)
+
+    @property
+    def is_authenticated(self):
+        """
+        If the user is authenticated.
+        :return: True if authenticated. False otherwise.
+        """
+        return self.authenticated
+
+    @property
+    def is_anonymous(self):
+        """
+        Return whether the student cna be anonymous
+        :return: False, because anonymity is not supported
+        """
+        return False
+
     def serialize(self, exclude_venmo_username=False, simplified=False):
         """
         A serialized the output for the student entry.
diff --git a/src/transactions/utils.py b/src/transactions/utils.py
new file mode 100644
index 0000000..9d33e29
--- /dev/null
+++ b/src/transactions/utils.py
@@ -0,0 +1,5 @@
+from src.extensions import client
+
+
+def get_user_by_username(username: str):
+    user_id = client.user.search_for_users(query=username, username=True)