Implement the endpoint: /avatars

[SOCSSabaragamuwa]

POST /avatars

POST /avatars HTTP/1.1
Content-Type: multipart/form-data;
Content-Disposition: form-data; name="avatar"; filename="avatar.png"

Request Parameter	Description	Required/Optional
user_id	The id of the user. If not provided, the avatar of the authenticated user should be updated.	Optional

GET /avatars?user_id={user_id}

This endpoint to retrieve a users avatar.

Request Parameter	Description	Required/Optional
user_id	User identifier	Required