diff --git a/code/backend/nest_backend/__main__.py b/code/backend/nest_backend/__main__.py
index d58ebb5..57839b5 100644
--- a/code/backend/nest_backend/__main__.py
+++ b/code/backend/nest_backend/__main__.py
@@ -5,22 +5,35 @@ from flask import Flask
 import os
 import werkzeug.middleware.proxy_fix
 from .routes import *
-from database import Base, tables
+from .database import Base, tables
 import psycopg2
-
+from .gestione import *
+from flask_jwt_extended import *
 
 app = Flask(__name__)
 if os.getenv('COOKIE_SECRET'):
     app.secret_key = os.getenv('COOKIE_SECRET')
 else:
     app.secret_key = "testing"
+if os.getenv("JWT_SECRET_KEY"):
+    app.config["JWT_SECRET_KEY"] = os.getenv("JWT_SECRET_KEY")
+else:
+    app.config["JWT_SECRET_KEY"] = "testing"
+
 reverse_proxy_app = werkzeug.middleware.proxy_fix.ProxyFix(app=app, x_for=1, x_proto=0, x_host=1, x_port=0, x_prefix=0)
 app.config['SQLALCHEMY_DATABASE_URI'] = 'postgresql://postgres:password@localhost:5432/PdSDev'
 Base.app = app
 Base.init_app(app)
+jwt = JWTManager(app)
 # Routes setup
-app.add_url_rule("/doa", view_func=page_doa, methods=["GET"])
+
+app.add_url_rule("/doa", view_func=page_doa, methods=["GET", "POST"])
+app.add_url_rule("/api/login", view_func=page_login, methods=["POST"])
+app.add_url_rule("/api/user/create", view_func=page_user_create, methods=["POST"])
 
 if __name__ == "__main__":
     Base.create_all()
+    if not User.query.filter_by(isAdmin=True).all():
+        Base.session.add(User(email="admin@admin.com", password=gen_password("password"), username="admin", isAdmin=True))
+        Base.session.commit()
     app.run(debug=True)
diff --git a/code/backend/nest_backend/database/tables/Alert.py b/code/backend/nest_backend/database/tables/Alert.py
index 03f058e..ff9a7a3 100644
--- a/code/backend/nest_backend/database/tables/Alert.py
+++ b/code/backend/nest_backend/database/tables/Alert.py
@@ -15,5 +15,5 @@ class Alert(Base.Model):
     repository_id = Base.Column(Base.Integer, Base.ForeignKey("repository.id"), nullable=False)
     # Relationships
     repository = Base.relationship("Repository", back_populates="alerts")
-    notifications = Base.relationship("Notifications", back_populates="alerts")
+    notifications = Base.relationship("Notification", back_populates="alert")
     operations = Base.relationship("BoolOperation", back_populates="alert")
\ No newline at end of file
diff --git a/code/backend/nest_backend/database/tables/BoolOperation.py b/code/backend/nest_backend/database/tables/BoolOperation.py
index 5fca10d..927feae 100644
--- a/code/backend/nest_backend/database/tables/BoolOperation.py
+++ b/code/backend/nest_backend/database/tables/BoolOperation.py
@@ -19,7 +19,7 @@ class BoolOperation(Base.Model):
     # Relationships
     condition = Base.relationship("Condition", back_populates="operations")
     node_1 = Base.relationship("BoolOperation", primaryjoin=("bool_operation.c.node_1_id==bool_operation.c.id"),
-                               remote_side="BoolOperation.id", backref=backref("father", uselist=False))
+                               remote_side="BoolOperation.id", backref=backref("father_1", uselist=False))
     node_2 = Base.relationship("BoolOperation", primaryjoin=("bool_operation.c.node_2_id==bool_operation.c.id"),
-                               remote_side="BoolOperation.id", backref=backref("father", uselist=False))
+                               remote_side="BoolOperation.id", backref=backref("father_2", uselist=False))
     alert = Base.relationship("Alert", back_populates="operations")
diff --git a/code/backend/nest_backend/database/tables/Repository.py b/code/backend/nest_backend/database/tables/Repository.py
index 1a14cfa..27dfe8a 100644
--- a/code/backend/nest_backend/database/tables/Repository.py
+++ b/code/backend/nest_backend/database/tables/Repository.py
@@ -17,4 +17,5 @@ class Repository(Base.Model):
     owner = Base.relationship("User", back_populates="owner_of")
     authorizations = Base.relationship("Authorization", back_populates="repository")
     tweets = Base.relationship("Composed", back_populates="repository")
-    alerts = Base.relationship("Alert", back_populates="repository")
\ No newline at end of file
+    alerts = Base.relationship("Alert", back_populates="repository")
+    uses = Base.relationship("Uses", back_populates="repository")
\ No newline at end of file
diff --git a/code/backend/nest_backend/gestione.py b/code/backend/nest_backend/gestione.py
index 9e7573a..72a5242 100644
--- a/code/backend/nest_backend/gestione.py
+++ b/code/backend/nest_backend/gestione.py
@@ -5,3 +5,59 @@ A utilities Python Module.
 Gestione adds many fancy thingamajigs to the flask application, such as a login system and such.
 """
 
+from .database import *
+import bcrypt
+import functools
+from flask_jwt_extended import get_jwt_identity
+
+
+def authenticate(username, password):
+    """
+    Authentication method. It checks if the combination of username+password is a valid match. If not, it returns None.
+    :param username: the user's email
+    :param password: the user's password
+    :return: if the credentials are correct, it returns the user. Else, it returns None.
+    """
+    user = User.query.filter_by(email=username).first()
+    try:
+        if bcrypt.checkpw(bytes(password, encoding="utf-8"), user.password):
+            return user
+    except AttributeError:
+        # Se non esiste l'Utente
+        return None
+
+
+def identity(payload):
+    """
+    Authentication verification method. It checks if the user is in fact registered on the server.
+    It is required by Flask-JWT, and shouldnt be used alone.
+    :param payload: the reqest payload.
+    :return: an User or None. It depends whether the user is actually registered on the platform.
+    """
+    user_id = payload['identity']
+    user = User.query.filter_by(id=user_id).first()
+    if user:
+        return user.id
+    return None
+
+
+def gen_password(password):
+    """
+    It generates an hashed password.
+    :param password: the password that needs to be hashed.
+    :return: the password's hash.
+    """
+    return bcrypt.hashpw(bytes(password, "utf-8"), bcrypt.gensalt())
+
+
+def find_user(email):
+    return User.query.filter_by(email=email).first()
+
+
+def admin_or_403(f):
+    @functools.wraps(f)
+    def func(*args, **kwargs):
+        current_user = get_jwt_identity()
+        return f(*args, **kwargs)
+
+    return func
diff --git a/code/backend/nest_backend/routes/__init__.py b/code/backend/nest_backend/routes/__init__.py
index 1a1609c..6752c31 100644
--- a/code/backend/nest_backend/routes/__init__.py
+++ b/code/backend/nest_backend/routes/__init__.py
@@ -2,4 +2,5 @@
 This module imports all the routes that return something to the frontend.
 """
 
-from .doa import page_doa
\ No newline at end of file
+from .doa import page_doa
+from .users import *
\ No newline at end of file
diff --git a/code/backend/nest_backend/routes/doa.py b/code/backend/nest_backend/routes/doa.py
index 58ff15f..a8fc545 100644
--- a/code/backend/nest_backend/routes/doa.py
+++ b/code/backend/nest_backend/routes/doa.py
@@ -2,12 +2,15 @@
 Page that displays a message if the server is on
 """
 
-from flask import render_template, abort
+from flask import render_template, abort, jsonify, request
 from ..database import *
 
 
-
-
 def page_doa():
-    utente = Utente()
-    return "If you see this, the server is fine."
+    """
+    Dead or Alive page. If a client sees this, the server is probably fine.
+    :return: A friendly and calming message, that makes you happy that the server is not on fire.
+    """
+    if request.method == "GET":
+        return "If you see this, the server is fine."
+    return "Hello there."
diff --git a/code/backend/nest_backend/routes/users/__init__.py b/code/backend/nest_backend/routes/users/__init__.py
new file mode 100644
index 0000000..f83b7ce
--- /dev/null
+++ b/code/backend/nest_backend/routes/users/__init__.py
@@ -0,0 +1,2 @@
+from .user_create import page_user_create
+from .login import page_login
\ No newline at end of file
diff --git a/code/backend/nest_backend/routes/users/login.py b/code/backend/nest_backend/routes/users/login.py
new file mode 100644
index 0000000..3948521
--- /dev/null
+++ b/code/backend/nest_backend/routes/users/login.py
@@ -0,0 +1,21 @@
+from flask import render_template, abort, jsonify, request
+from ...database import *
+from ...gestione import *
+from flask_jwt_extended import create_access_token
+
+
+def page_login():
+    """
+    The API call that allows to log-in. It requires:
+    :form email: The user's email
+    :form password: The users's password
+    :return: Json-formatted data. If the login is successful, it will contain the access_token.
+
+    The access_token must be included in the Authorization header, using the format Bearer <token>.
+    """
+    email = request.json.get("email", None)
+    password = request.json.get("password", None)
+    if authenticate(email, password):
+        access_token = create_access_token(identity=email)
+        return jsonify({"result": "success", "access_token": access_token}), 201
+    return jsonify({"result": "failure", "msg": "Bad username or password."}), 401
diff --git a/code/backend/nest_backend/routes/users/user_create.py b/code/backend/nest_backend/routes/users/user_create.py
new file mode 100644
index 0000000..bf98b3f
--- /dev/null
+++ b/code/backend/nest_backend/routes/users/user_create.py
@@ -0,0 +1,22 @@
+from flask import render_template, abort, jsonify, request
+from ...database import *
+from flask_jwt_extended import jwt_required
+from ...gestione import *
+
+@jwt_required()
+def page_user_create():
+    """
+    The API call that allows to create new users. It requires:
+    :form email: The user's email
+    :form password: The users's password
+    :form username: The users's username
+    :return: Json-formatted data. If something goes wrong, it returns a
+    {'result':'failure', 'content':'something blew up'}, else it returns {'result':'success', 'content':{newUser.to_json()}.
+    """
+    user = find_user(get_jwt_identity())
+    if not user.isAdmin:
+        abort(403)
+    nUser = User(email=request.json.get("email"), password=gen_password(request.json.get("password")), username=request.json.get("username"))
+    Base.session.add(nUser)
+    Base.session.commit()
+    return jsonify({"result":"success", "content":"something"})
diff --git a/code/backend/poetry.lock b/code/backend/poetry.lock
index 5ebbdf2..a81a551 100644
--- a/code/backend/poetry.lock
+++ b/code/backend/poetry.lock
@@ -1,3 +1,30 @@
+[[package]]
+name = "bcrypt"
+version = "3.2.0"
+description = "Modern password hashing for your software and your servers"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+cffi = ">=1.1"
+six = ">=1.4.1"
+
+[package.extras]
+tests = ["pytest (>=3.2.1,!=3.3.0)"]
+typecheck = ["mypy"]
+
+[[package]]
+name = "cffi"
+version = "1.14.5"
+description = "Foreign Function Interface for Python calling C code."
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+pycparser = "*"
+
 [[package]]
 name = "click"
 version = "7.1.2"
@@ -25,6 +52,22 @@ dev = ["pytest", "coverage", "tox", "sphinx", "pallets-sphinx-themes", "sphinxco
 docs = ["sphinx", "pallets-sphinx-themes", "sphinxcontrib-log-cabinet", "sphinx-issues"]
 dotenv = ["python-dotenv"]
 
+[[package]]
+name = "flask-jwt-extended"
+version = "4.1.0"
+description = "Extended JWT integration with Flask"
+category = "main"
+optional = false
+python-versions = ">=3.6,<4"
+
+[package.dependencies]
+Flask = ">=1.0,<2.0"
+PyJWT = ">=2.0,<3.0"
+Werkzeug = ">=0.14"
+
+[package.extras]
+asymmetric_crypto = ["cryptography (>=3.0,<4.0)"]
+
 [[package]]
 name = "flask-sqlalchemy"
 version = "2.5.1"
@@ -86,6 +129,36 @@ category = "main"
 optional = false
 python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*"
 
+[[package]]
+name = "pycparser"
+version = "2.20"
+description = "C parser in Python"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[[package]]
+name = "pyjwt"
+version = "2.0.1"
+description = "JSON Web Token implementation in Python"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.extras]
+crypto = ["cryptography (>=3.3.1,<4.0.0)"]
+dev = ["sphinx", "sphinx-rtd-theme", "zope.interface", "cryptography (>=3.3.1,<4.0.0)", "pytest (>=6.0.0,<7.0.0)", "coverage[toml] (==5.0.4)", "mypy", "pre-commit"]
+docs = ["sphinx", "sphinx-rtd-theme", "zope.interface"]
+tests = ["pytest (>=6.0.0,<7.0.0)", "coverage[toml] (==5.0.4)"]
+
+[[package]]
+name = "six"
+version = "1.15.0"
+description = "Python 2 and 3 compatibility utilities"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
+
 [[package]]
 name = "sqlalchemy"
 version = "1.4.10"
@@ -132,9 +205,57 @@ watchdog = ["watchdog"]
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.8.5"
-content-hash = "71b957004ae80674013de8327f592dd17b9ffb4e5c6a865e69326555f9c2a1ce"
+content-hash = "6bc937df83a15e8774d6ab63f19f5b6b3780730d935678c81259f53ee7cd8ebc"
 
 [metadata.files]
+bcrypt = [
+    {file = "bcrypt-3.2.0-cp36-abi3-macosx_10_9_x86_64.whl", hash = "sha256:c95d4cbebffafcdd28bd28bb4e25b31c50f6da605c81ffd9ad8a3d1b2ab7b1b6"},
+    {file = "bcrypt-3.2.0-cp36-abi3-manylinux1_x86_64.whl", hash = "sha256:63d4e3ff96188e5898779b6057878fecf3f11cfe6ec3b313ea09955d587ec7a7"},
+    {file = "bcrypt-3.2.0-cp36-abi3-manylinux2010_x86_64.whl", hash = "sha256:cd1ea2ff3038509ea95f687256c46b79f5fc382ad0aa3664d200047546d511d1"},
+    {file = "bcrypt-3.2.0-cp36-abi3-manylinux2014_aarch64.whl", hash = "sha256:cdcdcb3972027f83fe24a48b1e90ea4b584d35f1cc279d76de6fc4b13376239d"},
+    {file = "bcrypt-3.2.0-cp36-abi3-win32.whl", hash = "sha256:a67fb841b35c28a59cebed05fbd3e80eea26e6d75851f0574a9273c80f3e9b55"},
+    {file = "bcrypt-3.2.0-cp36-abi3-win_amd64.whl", hash = "sha256:81fec756feff5b6818ea7ab031205e1d323d8943d237303baca2c5f9c7846f34"},
+    {file = "bcrypt-3.2.0.tar.gz", hash = "sha256:5b93c1726e50a93a033c36e5ca7fdcd29a5c7395af50a6892f5d9e7c6cfbfb29"},
+]
+cffi = [
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+    {file = "cffi-1.14.5-cp39-cp39-manylinux1_i686.whl", hash = "sha256:9de2e279153a443c656f2defd67769e6d1e4163952b3c622dcea5b08a6405322"},
+    {file = "cffi-1.14.5-cp39-cp39-manylinux1_x86_64.whl", hash = "sha256:6e4714cc64f474e4d6e37cfff31a814b509a35cb17de4fb1999907575684479c"},
+    {file = "cffi-1.14.5-cp39-cp39-manylinux2014_aarch64.whl", hash = "sha256:158d0d15119b4b7ff6b926536763dc0714313aa59e320ddf787502c70c4d4bee"},
+    {file = "cffi-1.14.5-cp39-cp39-win32.whl", hash = "sha256:afb29c1ba2e5a3736f1c301d9d0abe3ec8b86957d04ddfa9d7a6a42b9367e396"},
+    {file = "cffi-1.14.5-cp39-cp39-win_amd64.whl", hash = "sha256:f2d45f97ab6bb54753eab54fffe75aaf3de4ff2341c9daee1987ee1837636f1d"},
+    {file = "cffi-1.14.5.tar.gz", hash = "sha256:fd78e5fee591709f32ef6edb9a015b4aa1a5022598e36227500c8f4e02328d9c"},
+]
 click = [
     {file = "click-7.1.2-py2.py3-none-any.whl", hash = "sha256:dacca89f4bfadd5de3d7489b7c8a566eee0d3676333fbb50030263894c38c0dc"},
     {file = "click-7.1.2.tar.gz", hash = "sha256:d2b5255c7c6349bc1bd1e59e08cd12acbbd63ce649f2588755783aa94dfb6b1a"},
@@ -143,6 +264,10 @@ flask = [
     {file = "Flask-1.1.2-py2.py3-none-any.whl", hash = "sha256:8a4fdd8936eba2512e9c85df320a37e694c93945b33ef33c89946a340a238557"},
     {file = "Flask-1.1.2.tar.gz", hash = "sha256:4efa1ae2d7c9865af48986de8aeb8504bf32c7f3d6fdc9353d34b21f4b127060"},
 ]
+flask-jwt-extended = [
+    {file = "Flask-JWT-Extended-4.1.0.tar.gz", hash = "sha256:77ca23f23e80480ea42b9c1d9b0fca214e08db7192583e782c2421416b4a4655"},
+    {file = "Flask_JWT_Extended-4.1.0-py2.py3-none-any.whl", hash = "sha256:f952f4ebd449182431c6755acfb7cbb52b8034df7a9f9ef95eb51ccfc1e235b0"},
+]
 flask-sqlalchemy = [
     {file = "Flask-SQLAlchemy-2.5.1.tar.gz", hash = "sha256:2bda44b43e7cacb15d4e05ff3cc1f8bc97936cc464623424102bfc2c35e95912"},
     {file = "Flask_SQLAlchemy-2.5.1-py2.py3-none-any.whl", hash = "sha256:f12c3d4cc5cc7fdcc148b9527ea05671718c3ea45d50c7e732cceb33f574b390"},
@@ -252,6 +377,18 @@ psycopg2 = [
     {file = "psycopg2-2.8.6-cp39-cp39-win_amd64.whl", hash = "sha256:d5062ae50b222da28253059880a871dc87e099c25cb68acf613d9d227413d6f7"},
     {file = "psycopg2-2.8.6.tar.gz", hash = "sha256:fb23f6c71107c37fd667cb4ea363ddeb936b348bbd6449278eb92c189699f543"},
 ]
+pycparser = [
+    {file = "pycparser-2.20-py2.py3-none-any.whl", hash = "sha256:7582ad22678f0fcd81102833f60ef8d0e57288b6b5fb00323d101be910e35705"},
+    {file = "pycparser-2.20.tar.gz", hash = "sha256:2d475327684562c3a96cc71adf7dc8c4f0565175cf86b6d7a404ff4c771f15f0"},
+]
+pyjwt = [
+    {file = "PyJWT-2.0.1-py3-none-any.whl", hash = "sha256:b70b15f89dc69b993d8a8d32c299032d5355c82f9b5b7e851d1a6d706dffe847"},
+    {file = "PyJWT-2.0.1.tar.gz", hash = "sha256:a5c70a06e1f33d81ef25eecd50d50bd30e34de1ca8b2b9fa3fe0daaabcf69bf7"},
+]
+six = [
+    {file = "six-1.15.0-py2.py3-none-any.whl", hash = "sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced"},
+    {file = "six-1.15.0.tar.gz", hash = "sha256:30639c035cdb23534cd4aa2dd52c3bf48f06e5f4a941509c8bafd8ce11080259"},
+]
 sqlalchemy = [
     {file = "SQLAlchemy-1.4.10-cp27-cp27m-macosx_10_14_x86_64.whl", hash = "sha256:6c24884bb8d0065cf6f61b643e8f32947ef8386a5bcdad41b921ed81994ea8f1"},
     {file = "SQLAlchemy-1.4.10-cp27-cp27m-manylinux1_x86_64.whl", hash = "sha256:266fbf4a0d3f4ed614fff60485e3ba83d3eef4a736102b9b7e461402dc930234"},
diff --git a/code/backend/pyproject.toml b/code/backend/pyproject.toml
index 5f87c99..f36e6c2 100644
--- a/code/backend/pyproject.toml
+++ b/code/backend/pyproject.toml
@@ -9,6 +9,8 @@ python = "^3.8.5"
 psycopg2 = "^2.8.6"
 Flask = "^1.1.2"
 Flask-SQLAlchemy = "^2.5.1"
+bcrypt = "^3.2.0"
+Flask-JWT-Extended = "^4.1.0"
 
 [tool.poetry.dev-dependencies]
 
diff --git a/code/frontend/src/media/LogoLight.png b/code/frontend/src/media/LogoLight.png
index 85f3fa8..6f12ea1 100644
Binary files a/code/frontend/src/media/LogoLight.png and b/code/frontend/src/media/LogoLight.png differ