BadRequestError creates an APIError instance representing a BadRequest.

InternalServerError creates an APIError instance representing an InternalServer error.

NewAPIError creates an instance of APIError.

Create an error response.

Create a successful response.

NotFoundError creates an APIError instance representing a NotFound.

UnauthorizedError creates an APIError instance representing an Unauthorized.

APIError is a structure for storing API error information.

Response is a basic structure for API response.