Variable Mismatch on variable column_type

Having some trouble trouble shooting my error. I’ve read through a few other solutions to what I believe the problem I am having, but have yet to find a solution. Is column_type not a String?

I am creating columns with the following code:

Note, I am using python=3.10

def create_columns(board_id, title, column_type, default_values=None):
    if default_values:
        vals_dict = {}
        for cnt, vals in enumerate(default_values):
            vals_dict[cnt + 1] = vals
        status_values = {"labels": vals_dict}
    else:
        status_values = ''

    query = """
    mutation ($boardId: ID!, $titleName: String!, $columnType: String!, $defaultValues: JSON) {
        create_column(
            board_id: $boardId
            title: $titleName
            column_type: $columnType
            defaults: $defaultValues
        ) {
            id
        }
        }
    """

    variables = {
    'boardId': board_id,
    'titleName': title,
    'columnType': column_type,
    'defualtValues': json.dumps(status_values, separators=(',', ':'))
    }

    datas = {
    'query': query,
    'variables': variables
    }

    r_boards = requests.post(url=apiUrl, headers=headers, data=json.dumps(datas)) # make request
    
    return r_boards

variables

>>>{'boardId': '123456', 'titleName': 'My - Title', 'columnType': 'status', 'defualtValues': '{"labels":{"1":"100 - column1","2":"200 - column2","3":"300 - column,,3"}}'}

Error Message

>>>{'errors': [{'message': 'Type mismatch on variable $columnType and argument column_type (String! / ColumnType!)', 'locations': [{'line': 6, 'column': 13}], 'path': ['mutation', 'create_column', 'column_type'], 'extensions': {'code': 'variableMismatch', 'variableName': 'columnType', 'typeName': 'String!', 'argumentName': 'column_type', 'errorMessage': 'Type mismatch'}}], 'account_id': 123456}