Download secure datasets a zip file- API | Implementation

[Prabhu4452]

Requirement:
Implement a new API which should provide capability for a data consumer to download datasets as a zip file based on the search query parameters that a data consumer provides as part of the API. To add more, the API should send a notification as an email to data consumer with the downloadable link of the datasets.

Key Points:

1. Token is a mandatory field.
2. At least one search query parameter is needed.
3. Resource Id could be an optional parameter.

Sample API endpoint structure:
https://vermillion.datasetu.org/API_Name?token=sample_token&id=sample_id&gender=male

Sample output:
An email to the data consumer with following content.

Subject: Download Links
Content:
Dear consumer,
The downloadable links for the datasets you requested are ready to be served. Please use below link to download the datasets as a zip file.
Sample downloadable link:
https://vermillion.datasetu.org/consumer/token/uuid/filename.zip

[Prabhu4452]

@vasanth096
The implementation is ready and the code for the same is being pushed into downloadByQuery branch. Please proceed and start testing from latest code.
Lemme know if anything is needed.