Fix: Add / Update user error when a role was added.

brewman/brewman/routers/user.py

@@ -102,7 +102,7 @@ def add_roles(user: User, roles: List[schemas.RoleItem], db: Session) -> None:
         ug = [g for g in user.roles if g.id == role.id_]
         ug = None if len(ug) == 0 else ug[0]
         if role.enabled and ug is None:
-            user.roles.append(db.execute(select(Role).where(Role.id == role.id_)).one())
+            user.roles.append(db.execute(select(Role).where(Role.id == role.id_)).scalar_one())
         elif not role.enabled and ug:
             user.roles.remove(ug)