Start working on database models

src/database.py

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+from sqlalchemy import create_engine
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+
+# SQLALCHEMY_DATABASE_URL = "sqlite:///./sql_app.db"
+SQLALCHEMY_DATABASE_URL = "postgresql://user:password@postgresserver/db"
+
+engine = create_engine(SQLALCHEMY_DATABASE_URL)
+
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+Base = declarative_base()

src/enums.py

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+from enum import Enum
+
+class MinigameEnum(str, Enum):
+    SpellingBee = 'SpellingBee'
+    Hangman = 'Hangman'
+    JustSign = 'JustSign'
+
+
+class CourseEnum(str, Enum):
+    Fingerspelling = 'Fingerspelling'
+    Animals = 'Animals'

src/models.py

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+from sqlalchemy import Boolean, Column, ForeignKey, Integer, String
+from sqlalchemy.orm import relationship
+
+from .enums import MinigameEnum, CourseEnum
+from .database import Base
+
+
+class User(Base):
+    __tablename__ = "users"
+
+    user_id = Column(Integer, primary_key=True, index=True)
+    username = Column(String, unique=True, index=True, nullable=False)
+    hashed_password = Column(String, nullable=False)
+
+    high_scores = relationship("HighScore", back_populates="owner")
+    course_progresses = relationship("CourseProgress", back_populates="owner")
+
+
+class HighScore(Base):
+    __tablename__ = "high_scores"
+
+    high_score_id = Column(Integer, primary_key=True, index=True)
+    score_value = Column(Integer, nullable=False)
+    minigame = Column(Enum(MinigameEnum), nullable=False)
+    owner = Column(Integer, ForeignKey("users.user_id"))
+
+
+class CourseProgress(Base):
+    __tablename__ = "course_progress"
+
+    course_progress_id = Column(Integer, primary_key=True, index=True)
+    course = Column(Enum(CourseEnum), nullable=False)
+    owner = Column(Integer, ForeignKey("users.user_id"))
+