docs fix, removed unused imports

Author: igorbenav

README.md

@@ -1284,4 +1284,4 @@ This project was inspired by a few projects, it's based on them with things chan
 
 ## 11. Contact
 Igor Magalhaes – [@igormagalhaesr](https://twitter.com/igormagalhaesr) – [email protected]
-[github.com/igormagalhaesr](https://github.com/igormagalhaesr/)
+[github.com/igorbenav](https://github.com/igorbenav/)

src/app/models/user.py

@@ -2,11 +2,10 @@
 import uuid as uuid_pkg
 from datetime import datetime
 
-from sqlalchemy import String, DateTime, ForeignKey
+from sqlalchemy import String, DateTime
 from sqlalchemy.orm import Mapped, mapped_column
 
 from app.core.database import Base
-from app.models.tier import Tier
 
 class User(Base):
     __tablename__ = "user"