reverting last change for primary_key

Author: anikolaienko

README.md

@@ -257,7 +257,7 @@ Base = declarative_base()
 
 class UserInfo(Base):
     __tablename__ = "users"
-    id = Column(Integer, pk=True)
+    id = Column(Integer, primary_key=True)
     full_name = Column(String)
     public_name = Column(String)
     hobbies = Column(String)
@@ -270,7 +270,7 @@ class UserInfo(Base):
 
 class PublicUserInfo(Base):
     __tablename__ = 'public_users'
-    id = Column(Integer, pk=True)
+    id = Column(Integer, primary_key=True)
     public_name = Column(String)
     hobbies = Column(String)