{:ok, _subscription} = User.subscribe(user, other_user)
{:ok, _user_relationship} = User.block(user, other_user)
{:ok, _user_relationship} = User.block(other_user, user)
{:ok, _subscription} = User.subscribe(user, other_user)
{:ok, _user_relationship} = User.block(user, other_user)
{:ok, _user_relationship} = User.block(other_user, user)