Pablo Ois Lagarde

Keep refresh token if the server does not return a new one on token refresh

4

My authorization server doesn't always send a new refresh token when refreshing access tokens (as allowed by [the spec](https://tools.ietf.org/html/rfc6749#section-1.5)). When it doesn't, Heimdallr overrides the stored refresh token with nil....

Keep refresh token if the server does not return a new one on token refresh

4

Closes #82

Sending messages to hidden users (HiddenUserServer)

5

WhatsApp sometimes hides the phone number when a user opens a chat with a business for the first time: > You can start a WhatsApp chat directly with a business...