Issue while trying to set enum data type in mysql database

What am I trying to do?

Django does not support setting enum data type in mysql database. Using below code, I tried to set enum data type.

Error Details

_mysql.connection.query(self, query) django.db.utils.ProgrammingError: (1064, "You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'NOT NULL, created_at datetime(6) NOT NULL, user_id bigint NOT NULL)' at line 1")

Am I missing anything?

Enumeration class with all choices

class enumTokenTypes(models.TextChoices):
    Registration = "Registration"
    ForgotPassword = "Forgot Password"

User Token class in model

class tblusertokens(models.Model):
    token_id = AutoField(primary_key=True)
    token_type = EnumField(max_length=20, choices=enumTokenTypes.choices)
    created_at = DateTimeField(auto_now_add=True, blank=True)
    user = ForeignKey(tblusers, on_delete = models.CASCADE)    

User token create model in migration

class EnumField(CharField):
    def db_type(self, connection):
        return "enum"


migrations.CreateModel(
    name='tblusertokens',
    fields=[
        ('token_id', models.AutoField(primary_key=True, serialize=False)),
        ('token_type', clientauth.models.EnumField(choices=[('Registration', 'Registration'), ('Forgot Password', 'Forgotpassword')], max_length=20)),
        ('created_at', models.DateTimeField(auto_now_add=True)),
        ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='clientauth.tblusers')),
    ],
)

Bounty Question

set 2 parameters to the function to pass comma separated values and a default value.

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