Check! In Serverless framework for Azure, when got an authentication error

When I had tried to use Serverless framework to deploy Faas on Azure, I got an error below.

Error

Serverless: Error logging into azure
Error — — — — — — — — — — — — — — — — — — — — — — — — —
Error: Authentication returned an empty list of subscriptions. Try another form of authentication. See the serverless-azure-functions README for more help

The capture of the error

All log of the error

Reason

This error has occurred when the target directory of Azure has no subscription.

As evidence, the subscription array in the authentication cache file ( ~/.azure/slsTokenCache.json ) is empty like below.

Example of ~/.azure/slsTokenCache.json

Solutions

There are two ways.

1. Remove the cache above and set your available directory as default directory of Azure account available(See below), then try it again.
2. Use another authentication with using Service Principal
   — See https://github.com/serverless/serverless-azure-functions#advanced-authentication

To set your default directory on Azure portal, see the following steps.

How to set your default directory on Azure portal

Has solved? Enjoy serverless development!