added Message in models

app/models.py

@@ -18,4 +18,9 @@ class User(Base):
 # attribute as a foreign key.
 class Message(Base):
     __tablename__ = "messages"
-    pass
+    id = Column(Integer, primary_key=True, index=True)
+    message = Column(String)
+    type = Column(String)
+    timestamp = Column(DateTime)
+    user_id = Column(Integer, ForeignKey("users.id"))
+    user = relationship("User", back_populates="messages")