Hashing user ID from online mmporg game

I am looking for someone to develop an algorithm for hashing user ids from an online mmporg game. With this, I need the hash to be secure and reliable. We will need to hash more than 50 user ids and authentication is not a concern. This project requires someone knowledgeable in cryptography with experience in hashing algorithms, so they can suggest the best one for my needs without compromising security. If you believe you have the expertise to do this properly, please contact me and I'll provide any additional information necessary. Thank you!