[Python] hash method implementation not working along set() [Python]

I am implementing a hash function in an object and as my hash value for such object I use the username hashed value, i.e:

class DiscordUser:
def __init__(self, username):
self.username = username

def __hash__(self):
return hash(self.username)


The problem arises when adding such objects to the hash set and comparing them with the exact same username as input for the constructor, i.e:

user = DiscordUser("Username#123")

if user in users_set:
# user is already in my users_set, such condition is NEVER MET, dont understand why

else:
# add user to users_set, this condition is met ALWAYS
users_set.add(user)


Why the hash funcion is not working as properly, or what im doing wrong here?

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