OAuth to generate token

:bulb: Idea It would be great if OAuth was implemented to generate tokens. The workflow should look as follows:

• App redirects to ntfy web app with special path/query parameters (including redirect URI)
• ntfy asks user to login if not done already
• ntfy asks user to authorize an application (create a token)
• ntfy redirects back to application (using redirect URI) with a generated auth code
• App queries ntfy access token by providing auth code

I suggest to use the "Single-Page Apps" workflow which does not require the app to register and maintain a secret.

:computer: Target components web app