Ecample of empty subscription in `~/.azure/slsTokenCache.json`. See https://link.medium.com/eEGXRL1v20

slsTokenCache.json

{
  "entries": [
    {
      "tokenType": "Bearer",
      "expiresIn": 3600,
      "expiresOn": "2019-10-21T08:57:07.417Z",
      "resource": "https://management.core.windows.net/",
      "accessToken": "<hidden>",
      "refreshToken": "<hidden>",
      "userId": "[email protected]",
      "isUserIdDisplayable": true,
      "familyName": "family-name",
      "givenName": "given-name",
      "identityProvider": "live.com",
      "tenantId": "xxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
      "isMRRT": true,
      "_clientId": "xxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
      "_authority": "https://login.microsoftonline.com/common"
    }
  ],
  "subscriptions": []
}