Simple go api which returns coin balance only for a authorized user.

Implemented with a mock database.

% go run cmd/api/main.go 
Starting GO API service...

Use Postman or other tool to query the endpoint http://localhost:8000/account/coins/?username=alex with correct Key: Authorization and Value: 123ABC This is particularly for the user alex. Use accordingly by looking at the mock db structure.

It returns a JSON response with Coin Balance and status code.

Returns error message and status code if incorrect values passed.