Can't lock player in UTIL Position NBA DraftKings

[MindingTheData]

I'm looking to lock certain players in the UTIL position on a DraftKings NBA contest.

Here's an example of what this might look like:

optimizer.player_pool.lock_player('Karl-Anthony Towns', 'UTIL')

However, I'm getting the following error:
LineupOptimizerException: Position UTIL doesn't exist. Available positions are C,PG,SG,SF,PF

Is there any way I'm able to specifically lock a player into the UTIL position?

[Milkman9691]

By using this is may work personally I have never tried this but it is a possibility

P1 = optimizer.player_pool.get_player_by_name('Karl-Anthony Towns', for_positions['UTIL'])