using rest_framework.authtoken instead of username and password when getting token

[will-emmerson]

I am already using rest_framework.authtoken in an api, I wondered if it's possible to use this instead of username and password, to then get a time-limited JWT with a certain scope.
I can see that TokenObtainSerializer.validate calls Django's authenticate but rest_framework.authtoken isn't a part of this so it doesn't work. I am not sure the best way to go about this, should I just overwrite TokenObtainSerializer.validate to not call Django's authenticate?

[Andrew-Chen-Wang]

Just overwrite if you plan on forgoing Django's authenticate function