How to properly generate a documentation with Swagger for Flask

I would like to ask how to generate a proper documentation with Swagger for Flask. I have tried many libraries like flassger, apispec, marshmallow, flask_apispec, etc but I didn't find the best one.

So I have a function here:

@app.route('/test', methods=['POST])
def test_function():
    data = request.get_json()
    validated_data = TestSchema().load(data)
    # Doing something here
    return jsonify({'data': 'success'}), 200

I already have a schema object with marshmallow as follow:

class TestSchema(Schema):
    id = fields.Int(required=True)
    name = fields.Str(required=True)

I want to automatically generate the documentation so that it is easier to know how to call my test API. How can I do this with swagger UI? I'm not really familiar with web programming and APISpec things, so it is inconvenience for me to generate it manually my writing yaml file.

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