for standard errors message.

for standard errors message.

for standard errors message.

for standard errors message.

ErrConflict will throw if the current action already exists.

ErrFailAuth will throw if the auth is not valid.

ErrInternalServerError will throw if any the Internal Server Error happen.

ErrInvalidRequest will throw if the given request-body or params is not valid.

ErrNotFound will throw if the requested item is not exists.