diff --git a/config.yml b/config.yml
index 7f1a02d..2e9073a 100644
--- a/config.yml
+++ b/config.yml
@@ -4,4 +4,5 @@ server_loglevel: "INFO"
 database_file: "database.db"
 server_host: "localhost"
 server_password: "sekret_password"
-server_access_username: "user"
\ No newline at end of file
+server_access_username: "user"
+jwt_secret: "sekrit"
\ No newline at end of file
diff --git a/database.db b/database.db
new file mode 100644
index 0000000..e69de29
diff --git a/fleetcontrol b/fleetcontrol
index 05192c6..6c508a3 100644
--- a/fleetcontrol
+++ b/fleetcontrol
@@ -5,7 +5,7 @@ from utils.config.config import ServerConfig
 
 config = ServerConfig()
 server = Server(host=config.server_host, port=config.server_port, name=config.server_name, access_password=config.server_password,
-                access_username=config.server_access_username, version="v0.0.1alpha", database_file_path=config.database_file, logging_level=config.server_loglevel)
+                access_username=config.server_access_username, jwt_secret=config.jwt_secret, version="v0.0.1alpha", database_file_path=config.database_file, logging_level=config.server_loglevel)
 
 server.run()
 
diff --git a/network/__pycache__/communication.cpython-310.pyc b/network/__pycache__/communication.cpython-310.pyc
index 8c65223..e8db3a4 100644
Binary files a/network/__pycache__/communication.cpython-310.pyc and b/network/__pycache__/communication.cpython-310.pyc differ
diff --git a/network/communication.py b/network/communication.py
index 009c473..787045f 100644
--- a/network/communication.py
+++ b/network/communication.py
@@ -2,8 +2,11 @@ from http.client import NON_AUTHORITATIVE_INFORMATION
 from flask import Flask, request, jsonify
 from utils.database.database import Database
 from utils.exceptions import DatabaseException
-from utils.models.models import Client
+from utils.models.models import Client, VMImage, User
+from utils.middleware.auth import require_auth
 import json
+import bcrypt
+import jwt
 
 
 class FlaskAppWrapper(object):
@@ -26,7 +29,7 @@ class FlaskAppWrapper(object):
 
 class Server():
 
-    def __init__(self, host: str, port: int, name: str, access_password: str, access_username: str, version: str, database_file_path: str, logging_level: str, ):
+    def __init__(self, host: str, port: int, name: str, access_password: str, access_username: str, jwt_secret: str, version: str, database_file_path: str, logging_level: str, ):
         self.host = host
         self.port = port
         self.name = name
@@ -36,12 +39,66 @@ class Server():
         self.database = Database(
             database_file=database_file_path, logging_level=logging_level)
         self.flask_app = Flask(name)
+        self.flask_app.config['SECRET_KEY'] = jwt_secret
+        self.flask_app.config['DATABASE_FILE_PATH'] = database_file_path
+        self.flask_app.config['LOGGING_LEVEL'] = logging_level
         self.app = FlaskAppWrapper(self.flask_app)
 
     def basic_server_data(self):
         return {"server_name": self.name, "server_version": self.version, "host": self.host}
 
-    def register_new_client_to_database(self):
+    def login(self):
+        try:
+            request_data = request.json
+            if not request_data:
+                return {
+                    "message": "Please provide login info",
+                    "data": None,
+                    "error": "Bad request"
+                }, 400
+
+            current_user = self.database.get_user_by_name(
+                request_data["username"])
+            if current_user is None:
+                return {
+                    "message": "Please provide correct login info",
+                    "data": None,
+                    "error": "Bad request"
+                }, 400
+            correct_password = False
+            temporary_salt = bcrypt.gensalt()
+            hashed_request_password = bcrypt.hashpw(
+                password=request_data["password"].encode("utf-8"), salt=temporary_salt)
+            if current_user.password_hash != hashed_request_password:
+                return {
+                    "message": "Invalid login data",
+                    "data": None,
+                    "error": "Auth error"
+                }, 401
+            try:
+                current_user["token"] = jwt.encode({
+                    "username": current_user["username"]
+                },
+                    self.flask_app.config["SECRET_KEY"],
+                    algorithm="HS256"
+                )
+                current_user.pop("password")
+                return current_user, 202
+            except Exception as ex:
+                return {
+                    "message": "Error loging in",
+                    "data": None,
+                    "error": f"Internal server error: {str(ex)}",
+                }, 500
+        except Exception as ex:
+            return {
+                "message": "Error loging in",
+                "data": None,
+                "error": f"Internal server error: {str(ex)}",
+            }, 500
+
+    @require_auth
+    def register_new_client_to_database(self, request_user):
         request_content_type = request.headers.get('Content-Type')
         json_string = ""
         if request_content_type == 'application/json':
@@ -60,6 +117,15 @@ class Server():
                 return response
 
     def run(self):
+        # add admin user to dataabse (or update existing one)
+        salt = bcrypt.gensalt()
+        temp_password_hash = bcrypt.hashpw(
+            self.access_password.encode("utf-8"), salt)
+        admin_user = self.database.get_user_by_name(self.access_username)
+        if admin_user == None:
+            admin_user = User(username=self.access_username,
+                              password_hash=temp_password_hash)
+        self.database.add_user(admin_user)
         self.app.add_endpoint(endpoint="/", endpoint_name="server_data",
                               handler=self.basic_server_data, methods=["GET"])
         self.app.add_endpoint(endpoint="/clients", endpoint_name="register_client",
diff --git a/utils/config/__pycache__/config.cpython-310.pyc b/utils/config/__pycache__/config.cpython-310.pyc
index 1d71752..a88902d 100644
Binary files a/utils/config/__pycache__/config.cpython-310.pyc and b/utils/config/__pycache__/config.cpython-310.pyc differ
diff --git a/utils/config/config.py b/utils/config/config.py
index 7a5d0e4..01f2844 100644
--- a/utils/config/config.py
+++ b/utils/config/config.py
@@ -18,6 +18,7 @@ class ServerConfig:
         server_port_override = os.environ.get("VALHALLA_SERVER_PORT")
         server_host_override = os.environ.get("VALHALLA_SERVER_HOST")
         server_password_override = os.environ.get("VALHALLA_SERVER_PASSWORD")
+        jwt_secret_override = os.environ.get("VALHALLA_JWT_SECRET")
         server_access_username_override = os.environ.get(
             "VALHALLA_SERVER_ACCESS_USERNAME")
         database_file_override = os.environ.get("VALHALLA_DATABASE_FILE")
@@ -38,6 +39,9 @@ class ServerConfig:
         if server_password_override:
             config["server_password"] = server_password_override
 
+        if jwt_secret_override:
+            config["jwt_secret"] = jwt_secret_override
+
         if server_access_username_override:
             config["server_access_username"] = server_access_username_override
 
@@ -49,5 +53,6 @@ class ServerConfig:
         self.database_file = config["database_file"]
         self.server_host = config["server_host"]
         self.server_password = config["server_password"]
+        self.jwt_secret = config["jwt_secret"]
         self.server_access_username = config["server_access_username"]
         self.server_loglevel = config["server_loglevel"]
diff --git a/utils/database/__pycache__/database.cpython-310.pyc b/utils/database/__pycache__/database.cpython-310.pyc
index 772f4a4..a861f46 100644
Binary files a/utils/database/__pycache__/database.cpython-310.pyc and b/utils/database/__pycache__/database.cpython-310.pyc differ
diff --git a/utils/database/database.py b/utils/database/database.py
index 1753959..e4bc5dc 100644
--- a/utils/database/database.py
+++ b/utils/database/database.py
@@ -1,6 +1,7 @@
 from sqlalchemy import create_engine
 from sqlalchemy.orm import sessionmaker
-from utils.models.models import Client, VMImage
+from sqlalchemy.ext.declarative import declarative_base
+from utils.models.models import Client, VMImage, User
 from utils.exceptions.DatabaseException import DatabaseException
 import logging
 
@@ -163,3 +164,29 @@ class Database:
             self.logger.error(f"Couldn't modify object in database: {ex}")
             raise DatabaseException(
                 f"Couldn't modify object in database: {ex}")
+
+    def add_user(self, new_user: User):
+        try:
+            with self.session.begin():
+                self.session.add(new_user)
+                self.session.flush()
+                self.session.merge()
+        except Exception as ex:
+            self.logger.error(f"Couldn't add user to the database: {ex}")
+            raise DatabaseException(f"Couldn't add user to the database: {ex}")
+
+    def get_user_by_id(self, user_id: int) -> User:
+        try:
+            with self.session.begin():
+                return self.session.query(User).filter(User.user_id == user_id).first()
+        except Exception as ex:
+            self.logger.error(f"Error getting data from database: {ex}")
+            raise DatabaseException(f"Error getting data from database: {ex}")
+
+    def get_user_by_name(self, username: str) -> User:
+        try:
+            with self.session.begin():
+                return self.session.query(User).filter(User.username == username).first()
+        except Exception as ex:
+            self.logger.error(f"Error getting data from database: {ex}")
+            raise DatabaseException(f"Error getting data from database: {ex}")
diff --git a/utils/middleware/__init__.py b/utils/middleware/__init__.py
new file mode 100644
index 0000000..25d9ef7
--- /dev/null
+++ b/utils/middleware/__init__.py
@@ -0,0 +1 @@
+from . import auth
diff --git a/utils/middleware/__pycache__/__init__.cpython-310.pyc b/utils/middleware/__pycache__/__init__.cpython-310.pyc
new file mode 100644
index 0000000..8746ad3
Binary files /dev/null and b/utils/middleware/__pycache__/__init__.cpython-310.pyc differ
diff --git a/utils/middleware/__pycache__/auth.cpython-310.pyc b/utils/middleware/__pycache__/auth.cpython-310.pyc
new file mode 100644
index 0000000..b3a9f89
Binary files /dev/null and b/utils/middleware/__pycache__/auth.cpython-310.pyc differ
diff --git a/utils/middleware/auth.py b/utils/middleware/auth.py
new file mode 100644
index 0000000..921ebaf
--- /dev/null
+++ b/utils/middleware/auth.py
@@ -0,0 +1,45 @@
+from functools import wraps
+import jwt
+from flask import request, abort
+from flask import current_app
+from utils.models.models import User
+from utils.database.database import Database
+
+# Inspired by: https://blog.loginradius.com/engineering/guest-post/securing-flask-api-with-jwt/ [access: 16.11.2022, 18:33 CET]
+
+
+def require_auth(f):
+    @wraps(f)
+    def decorated(*args, **kwargs):
+        token = None
+        if "Authorization" in request.headers:
+            token = request.headers["Authorization"].split(" ")[1]
+        if not token:
+            return {
+                "message": "Missing auth token",
+                "data": None,
+                "error": "Unauthorized"
+            }, 401
+        try:
+            database = Database(
+                database_file=current_app.config["DATABASE_FILE"], logging_level=current_app.config["LOGGING_LEVEL"])
+            user_data_from_request = jwt.decode(
+                token, current_app.config["SECRET_KEY"], algorithms=["HS256"])
+            request_user = database.get_user_by_name(
+                username=user_data_from_request["username"])
+            if request_user is None:
+                return {
+                    "message": "Invalid auth token",
+                    "data": None,
+                    "error": "Unauthorized"
+                }, 403
+        except Exception as ex:
+            return {
+                "message": "Internal server error",
+                "data": None,
+                "error": str(ex)
+            }, 500
+
+        return f(request_user, *args, **kwargs)
+
+    return decorated
diff --git a/utils/models/__pycache__/models.cpython-310.pyc b/utils/models/__pycache__/models.cpython-310.pyc
index 62ec91e..8a7fa42 100644
Binary files a/utils/models/__pycache__/models.cpython-310.pyc and b/utils/models/__pycache__/models.cpython-310.pyc differ
diff --git a/utils/models/models.py b/utils/models/models.py
index 01feba7..24060bd 100644
--- a/utils/models/models.py
+++ b/utils/models/models.py
@@ -1,8 +1,13 @@
 from sqlalchemy import Column, Integer, String, ForeignKey, Table
 from sqlalchemy.orm import relationship, backref
+from sqlalchemy import create_engine
 from sqlalchemy.ext.declarative import declarative_base
+from utils.config.config import ServerConfig
 
-Base = declarative_base()
+config = ServerConfig()
+engine = create_engine(f"sqlite:///{config.database_file}")
+Base = declarative_base(bind=engine)
+Base.metadata.create_all()
 
 client_image_table = Table(
     "client_image",
@@ -19,9 +24,8 @@ class Client(Base):
     hostname = Column(String(100), nullable=False)
     client_version = Column(String(100), nullable=False)
     vm_list_on_machine = relationship(
-        "VMImages",
+        "VMImage",
         secondary=client_image_table,
-        back_populates="vm_images"
     )
 
     def has_vm_installed(self, vm_object):
@@ -37,16 +41,15 @@ class VMImage(Base):
     image_name = Column(String(100), unique=True, nullable=False)
     image_file = Column(String(500), unique=False, nullable=False)
     image_version = Column(String(100), nullable=False)
-    image_hash = Column(String(500), nullalbe=False)
+    image_hash = Column(String(500), nullable=False)
     clients = relationship(
-        "Clients",
-        secondary=client_image_table,
-        back_populates="clients"
+        "Client",
+        secondary=client_image_table
     )
 
 
 class User(Base):
     __tablename__ = "users"
-    user_id = Column(Integer, primary_key=True)
+    user_id = Column(Integer, primary_key=True, autoincrement=True)
     username = Column(String)
     password_hash = Column(String)