what's the meaning of the “gty” claim in a jwt token?

Question

I have decoded JWT token using 'jwt.io' . I found one claim 'gty' in payload section. What is the meaning and significance of it.

Answer 1

gty is not a registered claim name as defined in RFC 7519.

Although I could not find any reference clearly stating it, it seems auth0.com uses gty for the grant_type that was used to request the token. e.g. client-credentials or password

Here's an example in the Auth0 community in which grant_type password and the gty claim are mentioned.