Importing hashed passwords into Keycloak

I want to create a user using a password that has already been hashed (using argon2). This is to validate the user migration process from my application's database to Keycloak.

I went to Authentication > Policies and configured the Hashing Algorithm as argon2. This way, when I create a "regular" password, it is automatically hashed to argon2.

I generated a hash using argon2 on the argon2.online platform. The parameters I used were the same as the default ones in Keycloak:

• Plain Text Input: password
• Salt: abcd1234
• Parallelism Factor: 1
• Memory Cost: 7168
• Iterations: 5
• Hash Length: 32

Using the Argon2id, the generated output was: $argon2id$v=19$m=7168,t=5,p=1$YWJjZDEyMzQ$M2pBlbaI2O0icDQslGeP1dTAVUxdnzx7GZr9N1Fdd04

I am using the following code to create a random user and then login:

import keycloak
import json
from datetime import datetime

password = 'password'

argon2_data = {
    'plain_text_input': password,
    'salt': 'abcd1234',
    'parallelism': 1,
    'memory_cost': 7168,
    'iterations': 5,
    'hash_length': 32,
    'hash': '$argon2id$v=19$m=7168,t=5,p=1$YWJjZDEyMzQ$M2pBlbaI2O0icDQslGeP1dTAVUxdnzx7GZr9N1Fdd04',
    'version': '1.3',
}

argon2_data['hash_parts'] = argon2_data['hash'].split('$')

def create_user():

    ts = datetime.now().strftime("%H%M%S")

    username = f"john{ts}"

    basic_credentials = {
        'type': 'password',
        'temporary': False,
        'value': password,
    }

    argon2_credentials = {
        'type': 'password',
        'temporary': False,
        'secretData': json.dumps({
            'value': argon2_data['hash_parts'][-1],
            'salt': argon2_data['hash_parts'][-2],
        }),
        'credentialData': json.dumps({
            'hashIterations': argon2_data['iterations'],
            'algorithm': 'argon2',
            'additionalParameters': {
                'hashLength': [str(argon2_data['hash_length'])],
                'memory': [str(argon2_data['memory_cost'])],
                'type': ['id'],
                'version': [argon2_data['version']],
                'parallelism': [str(argon2_data['parallelism'])],
            }
        })
    }

    user_data = {
        'attributes': {
            'custom_key': 'custom_value'
        },
        'credentials': [
            #basic_credentials,
            argon2_credentials,
        ],
        'username': username,
        'firstName': 'John',
        'lastName': 'Doe',
        'email': f'{username}@doe.com.br',
        'emailVerified': True,
        'enabled': True
    }

    print(user_data)

    keycloak.create_user(user_data)

    return user_data

user = create_user()

keycloak.test_login(user['username'], password)

Creating the user using basic_credentials allows me to log in successfully immediately. However, creating the user using argon2_credentials causes the login to return the error "invalid user credentials".

What could I be doing wrong?