added authorization, signup, login with jwt

database/__init__.py

@@ -0,0 +1,3 @@
+from flask_sqlalchemy import SQLAlchemy
+
+db = SQLAlchemy()

database/user.py

@@ -0,0 +1,8 @@
+from . import db
+
+
+class User(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    username = db.Column(db.String, unique=True)
+    email = db.Column(db.String, unique=True)
+    password = db.Column(db.String)